Oster Voltage drop or weak internal power supply

Microwave clock resets or display flickers when starting a cook cycle.

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.

Possible Causes

Undersized household circuit, Loose power cord connection, Failing control board power supply, Shorted internal component drawing excessive current

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

Use dedicated circuit: Move the microwave to a dedicated 15–20A outlet with no other large appliances.
Check cord and plug: Inspect for looseness or heat damage. Replace if necessary.
If flicker persists: The control board’s power supply or another internal component may be failing. Have a technician test and replace the faulty part.

Hard 4/5

Main Control Board (PCB)

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