1. Sometimes you can clean it inside to brighten it up for a while.
2. In some cases, we can replace the VFD to brighten one up if it's available for a given model.
3. The last solution is to replace the control circuit board.
For more specifics on the options 2 & 3, we would need your brand and full model number.Please note that FixYa is not currently notifying us Experts when Clarification Requests are answered.
To allow us to help you effectively (at no charge), please post a NEW problem to FixYa, and please
include your brand name and the full model number from the tag in or on
the unit, as well as your symptoms, "dim display".
As for suggestion # 1, cleaning:
At our Web site
, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
Then you can detach the keypad connector (as per attached photo) then remove the control panel screws.
Be careful not to crack the glass display when handling it, or it's a goner.
Then you can use a soft cloth (not a paper towel) and a mild cleaner (not ammonia-based) to clean the front surface of the VFD display glass and the rear side of the clear bezel (display window) that's attached to the keypad.
Direct spraying of cleaners on the keypad and steam from the cooktop can damage the controls.
I always recommend that you spray non-ammonia cleaner on a soft cloth (not a paper towel which can scratch) and gently wipe the keypad.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.