Common issues with electronic control boards and how to troubleshoot them effectively

Electronic control boards are an essential component of many electronic devices, including appliances, computers, and smartphones. These control boards, also known as circuit boards or PCBs, play a vital role in ensuring the proper functioning of these devices. However, just like any other electronic component, control boards can develop issues over time.

When your electronic device starts experiencing problems, it can be frustrating and inconvenient. However, understanding the common issues that can arise with electronic control boards and knowing how to troubleshoot them can save you time and money. In this troubleshooting guide, we will explore some of the most common problems that can occur with electronic control boards and provide you with solutions to fix them.

One common issue with electronic control boards is failure to power on or boot up. If your device is unresponsive and doesn’t turn on, it could be due to a problem with the control board. One possible solution is to check the power supply and make sure it is properly connected. You can also try resetting the device by disconnecting it from the power source for a few minutes and then reconnecting it. If the problem persists, it may be necessary to replace the control board.

Another common issue is malfunctioning or erratic behavior of the device. If your device is behaving strangely, such as freezing, lagging, or randomly shutting down, it could be caused by a faulty control board. In this case, you can try performing a software update or reinstalling the device’s firmware. If that doesn’t solve the problem, you may need to replace the control board to restore your device’s normal functioning.

Section 1: Power Issues

Power issues can commonly occur with electronic control boards and can stem from a variety of sources. Here, we will outline some common power issues that may arise and provide solutions for troubleshooting and resolving them.

No Power:

If your electronic control board is not receiving any power, it’s essential to check the power source and make sure it is securely connected. Begin by inspecting the power cord for any signs of damage or wear. If the power cord appears to be in good condition, check that it is plugged into a working electrical outlet. If the outlet is not functioning correctly, try using a different outlet or testing the original outlet with another device. Additionally, ensure that any power switches or buttons on the control board are in the proper position and functioning correctly.

Inconsistent Power:

In some cases, the control board may intermittently receive power or experience power fluctuations, resulting in inconsistent operation. If this occurs, begin by checking the power cord and outlet as described above. If the power source is not an issue, the problem may lie within the control board itself. Inspect the control board for any visible signs of damage, such as burn marks or loose connections. If any irregularities are found, it may be necessary to replace the control board or seek professional repairs.

Overheating:

Overheating can also cause power issues with electronic control boards. If the control board feels excessively hot to the touch or if the surrounding area is warm, it may be overheating. Insufficient airflow, dust accumulation, or a malfunctioning cooling fan can contribute to overheating. To address this issue, ensure that the control board and its surroundings are clean and free from obstructions. If the control board continues to overheat, consider installing additional cooling measures, such as a fan or heat sink, or consult a professional for further assistance.

By addressing power issues promptly and following these troubleshooting steps, you can identify and resolve common problems with electronic control boards. However, if the issue persists or if you are uncomfortable performing repairs yourself, it is always best to seek professional assistance to ensure the safe and efficient operation of your electronic devices.

Power Failure

Power failure is a common issue that can occur with electronic control boards. This can be caused by a variety of factors, including electrical surges, faulty wiring, or a malfunctioning power supply. When a power failure occurs, the control board may not receive the necessary power to function properly, resulting in various issues with the appliance.

To troubleshoot power failure issues with an electronic control board, follow these steps:

1. Check the power supply: Ensure that the appliance is properly plugged into a functioning power outlet. Use a multimeter to test the voltage of the outlet and verify that it meets the requirements for the appliance.
2. Inspect the power cord: Examine the power cord for any visible damage or frayed wires. If any issues are found, replace the power cord with a new one.
3. Test the electrical connections: Inspect the wiring connections between the power cord, control board, and other components. Make sure all connections are secure and properly connected.
4. Check for tripped circuit breakers: If the appliance is connected to a circuit breaker, check if any breakers have tripped. Reset any tripped breakers and test the appliance again.
5. Test the power supply unit: If all other steps fail to resolve the issue, the power supply unit may be faulty. Use a multimeter to test the voltage output of the power supply unit. If the voltage is not within the specified range, replace the power supply unit.

By following these troubleshooting steps, you can identify and resolve power failure issues with electronic control boards. However, if the issue persists, it is recommended to contact a professional technician for further assistance.

Tripped Circuit Breaker

In some cases, the electronic control board issues may be caused by a tripped circuit breaker. A tripped circuit breaker can disrupt the power supply to the control board, leading to a malfunction or complete shutdown of the appliance. Here’s how to troubleshoot and resolve this issue:

1. Locate the circuit breaker panel in your home. It is usually found in the basement, garage, or utility room.

2. Open the circuit breaker panel door.

3. Look for any circuit breakers that have flipped to the “off” position or are positioned between “off” and “on.” These are indications that a circuit has been tripped.

4. Identify the circuit breaker that corresponds to the power supply of your appliance. It may be labeled or numbered. If you’re unsure, you can try turning off and on each breaker to see which one affects the appliance.

5. Once you’ve identified the tripped circuit breaker, flip it to the “off” position and then back to the “on” position. This will reset the circuit breaker.

6. Check the appliance to see if the electronic control board issues have been resolved. If not, you may need to further troubleshoot the control board or consult a professional technician.

By following these steps, you can effectively troubleshoot and resolve electronic control board issues caused by a tripped circuit breaker. If the problem persists, it’s recommended to seek professional assistance to prevent further damage to the appliance.

Faulty Power Supply

A common issue with electronic control boards is a faulty power supply. If the power supply is not providing the correct voltage or is experiencing other electrical issues, it can cause a variety of problems with the control board.

One possible symptom of a faulty power supply is a completely dead control board. If the board is not receiving any power, it will not function at all. In this case, the power supply may need to be replaced or repaired.

Another symptom of a faulty power supply is intermittent issues with the control board. For example, the board may turn on and off sporadically, or certain functions may not work consistently. This can be caused by fluctuations in the power supply. In this case, it may be necessary to check the power supply connections and ensure they are secure.

If you suspect a faulty power supply, it is important to address the issue promptly to prevent further damage to the control board or other components. It is recommended to consult a professional technician or the manufacturer for assistance in diagnosing and resolving power supply issues.

Section 2: Display Problems

One of the most common issues with electronic control boards is display problems. If you’re experiencing issues with your display, here are a few troubleshooting steps to help you resolve the problem:

1. Check the Power Connection:

Make sure that the power cord is securely connected to both the electronic control board and the wall outlet. If the connection is loose or faulty, it can cause display issues.

2. Reset the Control Board:

Try resetting the electronic control board by turning off the appliance and unplugging it for a few minutes. Then, plug it back in and turn it on again. This can help resolve display issues caused by temporary glitches.

3. Inspect the Display Screen:

Check the display screen for any visible damage or debris. If you notice any cracks or dirt on the screen, it may need to be replaced. Contact the manufacturer or a professional technician for assistance.

4. Test the Control Board Connections:

Inspect the connections between the control board and the display screen. If there are any loose or damaged connections, they may need to be repaired or replaced. Again, it’s best to consult a professional for assistance with this.

5. Contact Customer Support:

If you’ve tried the above troubleshooting steps and are still experiencing display problems, reach out to the appliance manufacturer’s customer support. They will be able to provide further assistance and guide you through the process of resolving the issue.

By following these troubleshooting steps, you should be able to identify and resolve common display problems with your electronic control board.

Blank Display

If your electronic control board has a blank display, there are a few potential causes and solutions to consider:

1. Power issue: Check if the control board is receiving power. Ensure that it is properly connected to a power source and that the power supply is functioning correctly. If the control board does not have power, it will not be able to display any information.

2. Faulty display screen: The display screen itself may be defective. You can try resetting the control board by unplugging it from power for a few minutes and then plugging it back in. If this does not resolve the issue, you may need to replace the display screen.

3. Loose connections: Check for any loose or disconnected wires or cables connected to the control board. A loose connection can prevent the display from working properly. Ensure that all connections are secure and properly seated.

4. Faulty control board: If none of the above solutions work, the control board itself may be faulty. In this case, you will likely need to replace the control board with a new one in order to resolve the blank display issue.

If you are unsure about any of these troubleshooting steps or if the issue persists after trying them, it is recommended to reach out to a professional technician or the manufacturer for further assistance.

Flickering Display

One common issue that you may encounter with an electronic control board is a flickering display. This can make it difficult to read the information on the screen and may even cause you to misinterpret important messages or settings. Fortunately, there are a few steps you can take to troubleshoot and resolve this problem:

If none of these solutions resolve the flickering display issue, it may be a sign of a more serious problem with the control board. In this case, it is recommended to consult a professional technician or contact the manufacturer for repair or replacement options.

Display Error Codes

When dealing with electronic control board issues, it’s important to understand the various error codes that may be displayed on the control panel. These error codes can provide valuable information about the nature of the problem and help guide you towards a solution. Here are some common display error codes you may encounter:

Error Code E1: This code typically indicates a problem with the temperature sensor. It could mean that the sensor is faulty or that there is an issue with the wiring. Check the sensor and its connections, and replace if necessary.

Error Code E2: An E2 code usually points to a problem with the control board itself. This could be due to a malfunction or a damaged component on the board. If you encounter this error, it’s recommended to consult the manufacturer or a qualified technician for further assistance.

Error Code F1: The F1 code generally signifies a fault in the power supply. It could indicate a wiring issue, a blown fuse, or a problem with the power source itself. First, check the power supply and ensure that it is properly connected and functioning. If the issue persists, contact a professional for help.

Error Code F2: An F2 code often indicates an issue with the heating element. This could be due to a faulty element or a problem with the control board’s relay circuitry. Inspect the heating element for any visible damage and test its resistance with a multimeter. If necessary, replace the element or seek professional assistance.

Error Code F3: The F3 code typically points to a problem with the oven temperature sensor. It could mean that the sensor is defective or that there is an issue with the wiring. Check the sensor’s connections and test its resistance. If it doesn’t match the specified range, replace the sensor.

Error Code F4: An F4 code usually indicates a problem with the oven’s or stove’s temperature sensor. Similar to the F3 code, this could be due to a defective sensor or an issue with the wiring. Verify the sensor’s connections and test its resistance. Replace if necessary.

Error Code F5: The F5 code commonly signifies an issue with the oven door lock mechanism. It could mean that the door latch is faulty or that there is a problem with the control board’s door lock circuit. Inspect the door latch for any damage or obstructions. If it appears intact, the issue may lie with the control board or its wiring.

These are just a few examples of the error codes that may be displayed on the control panel of an electronic control board. Remember to consult the appliance’s manual or the manufacturer’s website for specific codes and their meanings. If you are unsure about how to interpret an error code or how to fix the problem, it’s always best to seek professional assistance to avoid further damage or safety risks.

Section 3: Button and Knob Malfunctions

One common issue with electronic control boards is malfunctioning buttons and knobs. These components play a crucial role in operating the control board and can become problematic over time. Here are some common button and knob malfunctions you may encounter:

1. Non-responsive buttons: If you press a button and it doesn’t respond, it could indicate a faulty connection or a worn-out button. Try cleaning the button or knob with a soft cloth and some rubbing alcohol. If that doesn’t work, you may need to replace the button or seek professional repair.

2. Stuck buttons: Buttons getting stuck in the pressed position can be frustrating. This can happen due to debris or dirt getting trapped underneath the button. Gently clean around the button with a soft-bristled brush and remove any obstructions. If the button continues to stick, it may require replacement.

3. Loose or wobbly knobs: If a knob feels loose or wobbly when you turn it, it could indicate a loose or broken connection. Check the knob for any visible damage or loose components. If necessary, tighten any screws or bolts holding the knob in place. If the issue persists, you may need to replace the knob.

4. Inconsistent button or knob response: If you notice that a button or knob is only responding intermittently, it could indicate a faulty electrical connection. Check the wiring connected to the button or knob and ensure it is secure and undamaged. If necessary, replace the wiring or seek professional assistance.

5. Malfunctioning control panel: In some cases, the entire control panel may malfunction, making it impossible to use any buttons or knobs. This could be due to a faulty control board or a damaged electrical connection. Consider consulting a professional technician to diagnose and repair the issue.

In conclusion, button and knob malfunctions are common problems with electronic control boards. By troubleshooting and addressing these issues promptly, you can ensure smooth and reliable operation of your electronic appliances.

Unresponsive Buttons

If the buttons on your electronic control board are unresponsive, there may be a few potential issues causing this problem. Follow these troubleshooting steps to diagnose and fix the problem:

2. Clean the buttons and control panel with a mild household cleaner and a soft cloth.

3. Gently wipe away any dirt or grime that may be causing the buttons to stick or become unresponsive.

4. Allow the buttons and control panel to dry completely before turning the power back on.

| | Loose or Damaged Connections |

1. Check the connections between the control board and the buttons.

2. Ensure that all connections are secure and free of any damage or corrosion.

3. If any connections are loose or damaged, tighten or replace them as necessary.

| | Defective Control Board |

1. Test the control board using a multimeter to check for any faulty components.

2. If the control board is found to be defective, it will need to be replaced.

3. Consult the appliance’s manufacturer or a professional technician for further assistance with replacing the control board.

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If none of the above solutions solve the problem or if you are unsure how to proceed, it is recommended to contact a professional technician for further evaluation and repair.

Stuck Buttons

One common problem with electronic control boards is stuck buttons. This can occur when debris or liquid gets trapped under the buttons, preventing them from functioning properly.

If you find that one or more buttons on your control board are not responding when pressed, it is likely that they are stuck. To fix this issue, follow these steps:

1. Power off the device and unplug it from the power source.
2. Use a soft, lint-free cloth to clean around the buttons.
3. If there is visible debris or liquid, use a small brush or toothpick to gently remove it.
4. Wipe down the buttons with a slightly damp cloth to remove any remaining dirt or residue.
5. Allow the control board to dry completely before plugging it back in and powering it on.

If the buttons are still stuck after following these steps, there may be a more serious issue with the control board. In this case, it is recommended to contact a professional technician for repairs or replacement.

Note: Avoid using excessive force or harsh cleaning chemicals when cleaning the buttons, as this can cause further damage to the control board.

By taking proper care and regularly cleaning your electronic control board, you can prevent issues with stuck buttons and ensure the optimal functioning of your device.

Loose Knobs

If you’re experiencing loose knobs on your electronic control board, it can be a frustrating issue. Loose knobs can make it difficult to control and adjust settings on your appliance. Fortunately, there are a few steps you can take to address this problem:

1. Check for loose screws: Start by inspecting the knobs to see if they are securely attached to the control board. If any screws are loose, use a screwdriver to tighten them. This simple fix may solve the issue.
2. Replace worn knobs: Over time, knobs can become worn out and lose their grip on the control board. If tightening the screws doesn’t solve the problem, consider replacing the knobs with new ones. Make sure to purchase knobs that are compatible with your specific control board model.
3. Apply adhesive: If the knobs are still loose after tightening the screws and replacing them, you may need to apply a small amount of adhesive to the control board shaft. This will help create a stronger bond between the knob and the control board, providing a tighter fit.
4. Contact a professional: If none of the above solutions work or if you’re uncomfortable performing these steps yourself, it’s best to contact a professional appliance repair technician. They have the knowledge and expertise to diagnose and fix control board issues effectively.

Remember, it’s important to address loose knobs on your electronic control board as soon as possible to prevent further damage and ensure optimal performance of your appliance. Follow these troubleshooting steps, and you’ll be well on your way to resolving the issue.

Section 4: Temperature Control Issues

If you are experiencing issues with the temperature control on your electronic control board, it can be frustrating and disruptive to your daily routines. Here are some common temperature control problems and their solutions:

Inaccurate Temperature Reading: If your electronic control board is displaying an inaccurate temperature, it could be due to a faulty temperature sensor. Check the sensor for any signs of damage or wear, and replace it if necessary.

Temperature Fluctuations: If the temperature in your appliance is constantly fluctuating, it may be caused by a malfunctioning thermostat or control board. Test the thermostat for continuity and replace it if needed. If the control board is faulty, it may need to be replaced.

Inconsistent Temperature: If the temperature in your appliance is consistently inconsistent, it could be due to a malfunctioning heating element or a faulty control board. Check the heating element for any signs of damage and replace it if necessary. If the control board is the issue, you may need to have it repaired or replaced.

Unresponsive Temperature Controls: If the temperature controls on your electronic control board are unresponsive, it could be due to a faulty control panel or a malfunctioning control board. Test the control panel for continuity and replace it if needed. If the control board is the culprit, it may need to be repaired or replaced.

Remember, troubleshooting electronic control board issues can be complex. If you are unsure of how to diagnose or fix the problem, it is recommended to consult a professional or contact the manufacturer for assistance.

Inaccurate Temperature Reading

One common issue with electronic control boards is an inaccurate temperature reading. This can be a frustrating problem because it can make it difficult to determine whether your appliance is operating at the desired temperature. However, there are a few common causes for this issue, along with potential solutions:

1. Thermistor Malfunction: A thermistor is a temperature sensor that is connected to the electronic control board. If the thermistor is faulty or damaged, it can result in inaccurate temperature readings. To fix this issue, you can try replacing the thermistor. Refer to your appliance’s manual or contact the manufacturer for specific instructions.
2. Calibration Issue: Sometimes, the electronic control board may need to be recalibrated in order to provide accurate temperature readings. You can refer to the appliance’s manual for instructions on how to calibrate the control board. If you are unsure or uncomfortable with attempting this yourself, it is recommended to contact a professional technician.
3. Poor Insulation: Another possible cause of inaccurate temperature readings is poor insulation in the appliance. If the insulation is damaged or worn out, it can allow heat to escape or enter the appliance, affecting the temperature readings. In this case, you may need to replace or repair the insulation to resolve the issue.
4. Software Glitch: In some cases, an inaccurate temperature reading may be the result of a software glitch in the control board. You can try resetting the control board by turning off the power to the appliance for a few minutes and then turning it back on. This can sometimes resolve minor software issues.
5. Environmental Factors: It’s important to consider the environmental factors that may affect the temperature readings. For example, if the appliance is located near a heat source or in direct sunlight, it can impact the accuracy of the readings. Ensure that the appliance is placed in an appropriate location away from any potential sources of heat or direct sunlight.

If the above solutions do not resolve the issue, it is recommended to contact a professional technician or the appliance manufacturer for further assistance. They will be able to diagnose the problem and provide a suitable solution to ensure accurate temperature readings.

Temperature Fluctuations

If you’re experiencing temperature fluctuations in your appliance, it could be due to a malfunctioning electronic control board. Temperature inconsistencies can lead to spoiled food and difficulty in cooking or storing items at the desired temperature. Here are some common problems and solutions to troubleshoot this issue:

1. Sensor issue: One possible cause of temperature fluctuations is a faulty temperature sensor. The sensor is responsible for detecting the current temperature inside the appliance and sending the information to the control board. If the sensor is not working correctly, it may provide inaccurate readings, leading to temperature fluctuations. A solution to this problem is to replace the faulty sensor with a new one.

2. Control board malfunction: Another possible cause of temperature fluctuations is a malfunctioning control board. The control board is responsible for regulating the temperature and ensuring that it stays at the desired level. If the control board is damaged or not functioning properly, it might not be able to maintain a constant temperature, resulting in fluctuations. In such cases, replacing the control board may be necessary.

3. Wiring or connection issues: Temperature fluctuations can also occur due to wiring or connection problems between the control board and other components of the appliance. Loose or damaged wires can disrupt the flow of electrical signals, affecting the control board’s ability to regulate temperature. Checking the wiring and connections, and repairing or replacing any damaged components, can help resolve this issue.

4. Power supply problems: In some cases, temperature fluctuations can be caused by issues with the power supply. Insufficient or fluctuating power supply can affect the control board’s performance, leading to temperature inconsistencies. Checking the power supply, including the electrical outlet and the appliance’s power cord, and ensuring that they are functioning correctly can help resolve this problem.

5. Environmental factors: Finally, it’s essential to consider environmental factors that can contribute to temperature fluctuations. Extreme ambient temperatures, improper ventilation, or placing the appliance near heat sources can all affect the appliance’s ability to maintain a constant temperature. Ensuring proper ventilation, keeping the appliance away from heat sources, and adjusting its settings according to the ambient temperature can help minimize temperature fluctuations.

By identifying and addressing the underlying cause of temperature fluctuations in your appliance, you can ensure that it operates efficiently and keeps your food fresh or maintains the desired temperature for your specific needs.

Inconsistent Heat Distribution

If you are experiencing inconsistent heat distribution in your electronic control board, there are a few potential causes and solutions you can try to resolve the issue.

1. Check the temperature sensors: First, make sure that the temperature sensors are functioning properly. These sensors are responsible for detecting the temperature inside the appliance. If they are faulty or not calibrated correctly, they may be providing incorrect readings to the control board, resulting in inconsistent heat distribution. Use a multimeter to check the resistance of the sensors and compare them to the manufacturer’s specifications. If they are outside the acceptable range, replace them.

2. Inspect the heating elements: The heating elements play a crucial role in distributing heat throughout the appliance. If they are damaged or not functioning properly, it can lead to inconsistent heat distribution. Inspect the heating elements for any signs of damage, such as visible cracks, burn marks, or loose connections. If you find any issues, replace the faulty heating elements.

3. Clean the vents and air filters: Clogged vents or dirty air filters can obstruct the airflow, preventing the proper distribution of heat. Check the vents and air filters for any debris, dust, or obstructions. Clean them thoroughly or replace them if necessary. Regularly cleaning the vents and air filters can help maintain consistent heat distribution.

4. Check the control board for issues: The control board itself may be faulty and causing the inconsistent heat distribution. Inspect the control board for any visible signs of damage, such as burnt components or loose connections. If you identify any problems, consider replacing the control board with a functioning one.

By addressing these potential causes and solutions, you can troubleshoot and resolve issues related to inconsistent heat distribution in your electronic control board.

Section 5: Timer and Delay Problems

One common issue with electronic control boards is problems with the timer and delay functions. These issues can prevent the appliance from starting or cause it to run for longer than necessary. Here are some common problems and solutions to help troubleshoot timer and delay issues:

1. Timer not working: If the timer is not functioning correctly, it could be due to a faulty timer motor or a problem with the wiring. Check the timer motor and the wiring connections to ensure they are secure. If the motor is defective, it will need to be replaced.

2. Delayed start: If the appliance is not starting immediately when the timer is set, the delay function may be the cause. Check the delay settings and ensure they are set correctly. If the delay function is not needed or desired, it can be disabled by adjusting the settings.

3. Incorrect delay time: If the appliance is running for a longer or shorter period than programmed, the delay time settings may need to be adjusted. Refer to the appliance manual for instructions on how to adjust the delay time. If the problem persists, there may be an issue with the control board that requires professional attention.

4. Timer display not working: If the timer display is not showing any numbers or is displaying garbled characters, there may be an issue with the display itself or with the control board. Check the display connections and ensure they are secure. If the issue persists, the display or control board may need to be replaced.

By troubleshooting these common timer and delay problems, you can often identify and resolve the issue without the need for professional help. However, if the problem persists or if you are unsure of how to proceed, it is recommended to contact a qualified technician for assistance.

Timer Not Functioning

If your electronic control board is experiencing issues with the timer function, there are a few common problems and solutions you can try before seeking professional assistance.

1. Check the timer settings:

• Make sure the timer is properly set and has not been accidentally turned off.
• Verify that the timer is set for the correct time and duration.

2. Inspect the timer display:

• Look for any error messages or unusual characters on the timer display.
• If you see any irregularities, try resetting the control board by turning off the power and then turning it back on.

3. Check the electrical connections:

• Ensure that the control board is properly connected to the power supply and that all connections are secure.
• Inspect the wiring for any signs of damage or loose connections.

4. Test the timer function:

• If possible, try using a different timer function to see if the issue persists.
• If the problem only occurs with one specific timer setting, there may be an issue with that particular function.

If none of these solutions resolve the timer malfunction issue, it is recommended to contact a professional technician or the manufacturer for further assistance. They will be able to diagnose the problem and provide a solution tailored to your specific electronic control board.

Delayed Start

If your electronic control board is experiencing a delayed start, there could be a few different causes and solutions to consider:

1. Power Issue: Check if there is a power problem causing the delay. Ensure that the electrical connections are secure and the power source is functioning properly. If necessary, try restarting the power supply to see if that resolves the issue.
2. Timer Settings: Verify that the timer settings on the control board are correct. Check if there are any programmed delays or if the timer is set to start at a specific time. Adjust the settings as needed to eliminate any delays.
3. Temperature Regulation: Some control boards have temperature sensors that can cause delays if the temperature is not within the desired range. Make sure that the temperature in the appliance or surrounding area is within the specified limits. If necessary, adjust the temperature or troubleshoot any temperature sensor issues.
4. Control Board Malfunction: If none of the above solutions solve the delayed start issue, there may be a malfunction with the control board itself. In this case, it is recommended to contact a professional technician for further inspection and repair.

By addressing these common causes and solutions, you can troubleshoot and resolve delayed start issues with your electronic control board.

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