LG Microwaves Display Not Working: How to Fix It Yourself
A blank or glitchy display on your LG microwave is often just a temporary glitch. A power cycle (unplug for 5 minutes) is the first thing to try. A loose ribbon cable connection is the second most common cause.
⚠️ Safety First
- Always unplug the appliance from the wall before starting any repair work.
- Microwaves contain a high-voltage capacitor that can hold a lethal charge even when unplugged. Do not open the microwave cabinet unless you are experienced with appliance repair. The steps below focus on safe, external fixes.
Parts You May Need
Step-by-Step Repair
- 1
Power cycle the unit
Unplug your LG microwave for 5 minutes, then plug it back in. A blank or glitchy display is often a temporary electronic glitch that a power reset fixes.
- 2
Check the brightness setting
Some LG microwaves have a display brightness control. The display might be working but set to the lowest brightness. Check your owner's manual for how to adjust display brightness.
- 3
Inspect the power supply
Make sure the outlet is working (plug something else in to test). If other functions work (the microwave heats, the light works) but the display is blank, the issue is specifically the display board or its connection.
- 4
Check the display ribbon cable
Unplug the microwave. On many LG models, the display connects to the main board with a ribbon cable. If you can access it (usually behind the control panel), check that the cable is firmly seated on both ends. A loose ribbon cable can cause a blank display.
- 5
Replace the display board
If the display is completely dead after checking power and connections, the display board likely needs replacing. For most LG microwaves, this part costs $30-$70. You may be able to find a replacement online and install it yourself by swapping the old board.
If That Didn't Work
- A faulty control board on your LG microwave could be the root cause, though this is less common.
- Wiring issues between components — loose or corroded connections — can cause intermittent problems.
When to Call a Professional
If the steps above don't fix your LG microwave, a professional repair technician can diagnose the issue quickly. Most repairs cost $100-$250 including parts and labor. If your microwave is older than 8-10 years, compare the repair estimate to the cost of a new one.
Related Repairs
Disclaimer: This guide is for informational and educational purposes only and does not constitute professional repair advice. All repairs are performed at your own risk. RepairItFree.com is not liable for any personal injury, property damage, device damage, voided warranties, or other losses resulting from the use of this information.
If you are unsure about any step — especially anything involving electricity, gas, water, or refrigerant — stop and consult a qualified professional. Your safety is more important than saving money.
See our full Terms of Service for complete legal details.