GE Control Board Self-Test or Power-On Display

Microwave display shows 8888 or all 8s; unit may be unresponsive.

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

Control board in diagnostic mode, Power surge or glitch, Failed control board display driver

Safety: Unplug the microwave before any internal inspection.

Reset power: Unplug for 1–2 minutes, then plug back in. Many GE models briefly show 8888 at power-up, then switch to the clock.
Check keypad response: If the display remains stuck on 8888 and keys do not respond, the control board may be locked or defective.
Try Clear/Off: Press and hold Clear/Off for several seconds to exit any test mode.
Replace control board: If the display remains frozen, the main control board or display board likely needs replacement.

Medium 3/5

Main Control Board

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