Samsung Power Interruption / Control Board Power Supply Issue

Microwave clock resets or display blinks after each use or randomly.

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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 outlet, Failing low-voltage power supply on PCB, Electrical noise on line

How to Fix / Troubleshooting

Safety: Ensure the microwave is plugged into a properly grounded outlet.

  • Check plug and outlet: Make sure the plug fits snugly. Try another outlet on a dedicated circuit if possible.
  • Avoid power strips: Plug the microwave directly into the wall outlet, not into a surge protector or extension cord.
  • Monitor behavior: If resets occur during heavy appliance use on the same circuit, consider moving the microwave to a different circuit.
  • Service board: If the issue persists on a known-good circuit, the control board's power supply may be failing and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Main Control Board (Power Supply Section)
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