Stopped working timer works, no lights fan

either the magnatron fried , or the fuse fried... either way the microwve has to be taken down and opened up.
If you have the serial number , GE will send you a replacement magnatron (but will not service the unit for you).
contact GE and they will take care of you... the magnatrons are warranted for like 10 years....

The door switches are often a problem, one or two are probably defective which would cause the symptoms that you are describing.

The door switches are more than likely the problem, one or two will need to be replaced, I recommend a professional.

Check the plug. If the vault is 110v or 220v etc.

If the plug seems to be right, but still not
working, you should buy a new one
with a good name brand you can trust.
It's better than paying for repairs and future repairs.

Most likely you have a magnetron problem. Easy to replace (DYI) but make sure the high voltage capacitor is fully discharged first against the case.

More than sure, the door micro switches do not work properly, they should be carefully checked.

All lights are operational. Model number is FMV156DBC.

get it repaired

Hi , open the cover with philips screw driver , b sure unplug it first , If you have continuety tester check the fuse if open replace it , are available in electronics center brings that sample and insert it.