Whirlpool display is dim

Hi,

What is the model number of the microwave oven?

Check and test the capacitors on the control board near to where the display assembly is connected. A lot of times the capacitors have gone faulty and this reduces the voltage to the backlight circuit for the screen making it dimmer.

Be safety aware when working in a microwave oven. Microwave ovens can be dangerous and can cause serious injuries if you don’t know what you’re doing The HV capacitor can store >6000V DC for months, even if the oven has been disconnected from the power supply for this length of time. The HV capacitor needs to be correctly discharged before commencing any other work inside the oven, after the cover has been removed.

If you don’t know what you’re doing, then don’t do it, it’s not worth the risk. Call a reputable, professional appliance repair service and ask for a quote.