LG Display Module or Power Supply Degradation

Microwave display is dim, flickering, or some segments are missing, but unit otherwise operates.

Advertisements

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.

Advertisements

Possible Causes

Aging VFD (vacuum fluorescent display), Failing display driver on main PCB, Low voltage from control board power supply, Loose display connector

How to Fix / Troubleshooting

Safety: Unplug the microwave before any disassembly.

User-level options:

  • Power reset: Unplug for 10 minutes and reconnect to see if flicker improves.
  • Check brightness setting: Some LG models allow adjusting display brightness in settings; increase if available.

Persistent dim or missing segments indicate a failing display or control board. Replacement of the control panel or main PCB is required and should be done by a technician.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

Display Module / Main PCB
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements