Model hvm1540dn1ww At first the "surface lights" went out, then slowly all the numbers. The only thing that works now is the "add 30" choice...?

most probably main transformer fuse blown. if fuse is ok & supply is ok on transformer input terminels.then replace magnetron

usually in this situation there is a problem with the panel just replace it there is a board behind it but iff the buttons dont respond then its most likley just the panel google the model number and you can get the panel

see the troubleshooting chart:and proceed with common sense
God bless you

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 unplug the keypad (as per the photo below) and move the circuit board into your frame.



Some connectors on the relays may have a lock:



We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

I have the same model, after 2 days of normal operation it has stopped working. No lights on the dislay at all and the keypad is unresponsive. If you open the door the light comes on and the turntable slowly rotates. Im taking it back.

The circuit board must be replaced.

1) First suggestion is for you to add a comment and say what model number Intermatic timer you are working with.
If this is a box timer, then model number shows on inside of door.
In any case, we are guessing at your problem without knowing model number.
2) If this is a box-type timer, main thing folks do wrong is reverse the line and load wires.
Line wires come from the breaker box, and Load wires go to the fan, light, motor.
Line wires have to be connected to the clock terminals or the dial will not rotate.
The clock terminals are usually visible as small white wires connect to two of the terminals. Again, this is dependent on model number.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Hello,

There is a child lock on this micro wave. If you do not have the manual it can be downloaded from the following site:-

www.retrevo.com/support/GE-JVM1640SJ-Microwaves-manual

Regards
Alan Hood
ami-man
UK

HI. this will happen over time if the microwave is used heavily and if it is over three years old. this key pad is attached to a smart board that you will need to replace. replacing the smart board will fix this issue.