Toshiba
Intermittent Power / Control Board Power Supply Issue
Microwave clock resets or display blinks after each use or when opening the door.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose power cord connection,Faulty internal power supply board,Cracked solder joints on control PCB,Line noise affecting logic supply
How to Fix / Troubleshooting
Safety first: Unplug the microwave before inspection.
Steps to troubleshoot:
- 1. Check outlet and plug: Ensure the plug fits snugly in the outlet and does not wiggle.
- 2. Avoid shared high-load circuits: Do not run the microwave on the same circuit as heavy appliances that may cause voltage dips.
- 3. Power reset: Unplug for 5–10 minutes, then plug back in and set the clock. Observe if it resets again after use.
If resets continue: The internal low-voltage power supply on the control PCB may be failing and should be repaired or replaced by a technician.
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Repair Difficulty
Medium
3/5
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