Display Not Showing Correctly.

1.Checkk the power source that the microwave is plugged into before beginning the repair process. If the microwave display is found to be defective, search online or visit a home appliance store to price the parts that will be needed to fix the display. The Repair FAQ website explains that unless the microwave isn't very old, purchasing a new microwave can be less expensive than fixing the old one. Depending on your model, you might need to replace an entire side-panel component.

2.Use a screwdriver to loosen and remove the microwave from the kitchen unit. After the microwave is placed on a secure surface, remove the panels to access the inner components. You'll need to thoroughly inspect the parts to determine why the display isn't working.

3.Loca the various fuses within the microwave to determine whether they need replacing. The Microwave Wizard website explains that the temperature and monitor fuses can affect the microwave's display. Examine whether the fuse is discolored or if the filament is broken.

4.Purchase new fuses and install them in the microwave as needed. The Microwave Wizard website explains that the individual should also check the circuit board within the microwave to determine whether any lines or digits are missing. The display issue can be related to missing solder in the circuit board.

5.Check the circuit board thoroughly to locate the broken line. Use the soldering iron to solder the line back into place. After replacing or fixing the fuses and lines, test the microwave display to ensure that it is working correctly.

See https://www.assinc.com/blog/2016/04/18/microwave-troubleshooting-tips/ [first 2 tips]. Or see the second answer by Webb-Guy at https://www.justanswer.com/appliance/f3hf3-whirlpool-microwave-model-wmc50522as-display.html/. Good luck!

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1.if the display on your microwave (or other electronic appliance) won't stop flashing numbers or characters and will not allow you to program it as necessary, try unplugging the unit. If the unit is built in, you may need to find the circuit breaker and flip the appropriate switch. Allow it sit for about a minute and then plug it back in. Just like with computers, sometimes all it takes to fix the issue is a good old-fashioned system .

2.Flashing or sparking

Do you see sparks or flashes of light emitting from the inside of your microwave? A microwave flashing from the inside could be the sign of a dirty or faulty metal wave guide cover inside your appliance. The wave guide cover protects and shields what is known as the "magnetron," the device that's responsible for directing and radiating heat waves toward the center of the appliance where food is placed. Do not attempt to remove, clean or repair the wave guide cover on your own. While the problem is likely not a severe safety hazard, do not attempt to remove the wave guide cover yourself. Tip: Immediately switch off the microwave and give Appliance Service Station a call to avoid injury or further appliance damage