Tower Display Backlight or VFD Failure

Microwave display is blank or very dim, but the unit still heats when buttons are pressed (if you can guess positions).

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

Failed display backlight LED, failed VFD (vacuum fluorescent display), faulty display driver on control PCB, loose display connector

Safety: Unplug before removing the control panel.

Steps:

1. Check contrast/brightness: Some Tower models allow brightness adjustment. Refer to the manual to ensure it is not set to minimum.
2. Power reset: Unplug for 5–10 minutes and test again.
3. Inspect connections (advanced): Remove the control panel and check the display module connector for looseness or corrosion.
4. Board replacement: If the display itself or its driver circuit has failed, replace the control PCB or display module as a unit.

Medium 3/5

Display Module

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