GE Spacemaker Microwave

Replace the burned-out bulb with a 120 volt, 30-watt incandescent bulb (WB36X10198), available from your GE supplier

• 1 To replace the oven light,

first disconnect the power at the main fuse or circuit breaker panel or pull the plug.

• 2 Remove the top grille by

taking out the 2 screws that hold it in place.

• 3 Remove the charcoal

filter (if present) to access the light cover (see Remove Charcoal Filter section).

• 4 Remove the light cover

located near the center of the oven that holds the bulb. Remove the bulb by gently turning. Replace with the same size and type bulb.

• 5 Replace the light cover

and charcoal filter (if present).

• 6 Replace the grille and

screws. Connect electrical power to the oven.
The full owners manual can be found here: http://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=49-40474.pdf

That's on page 33 of the owner's manual. If you've misplaced yours, it's archived online here.

Cooktop Light/
Night Light

Replace the burned-out
bulb with a 40-watt
incandescent bulb
(WB36X10003), available
from your GE supplier.

1 To replace the bulb(s),
first disconnect the power
at the main fuse or circuit
breaker panel or pull the
plug.
2 Remove the screw from
light cover and lower
the cover.
3 Be sure the bulb(s) to be
replaced are cool before
removing. After breaking
the adhesive seal, remove
the bulb by gently turning.
4 Replace the screw.
Connect electrical power
to the oven.

Oven Light

Replace the burned-out
bulb with a 40-watt
incandescent bulb
(WB36X10003), available
from your GE supplier.

1 To replace the oven light,
first disconnect the power
at the main fuse or circuit
breaker panel or pull the
plug.
2 Remove the top grille by
taking out the 2 screws
that hold it in place.
3 Next, remove the screw
located above the door
near the center of the
oven that secures the
light housing.
4 Replace the screw.
Connect electrical power
to the oven.

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

Remove the cabinet cover ... find the fuse on the floor - probably on the right hand side ...

There must be a short in the wiring between the bulb sockets and the power supply or control board. Otherwise the short may be in the bulb sockets themselves.
I would test the connections to make sure the wires aren't loose and all solder joints are tight. If all wires look good, and bulb sockets are tight, then the problem may be faulty capacitor

Have you checked the fuse in the plug? Also there is an internal fuse that you have to remove the outer casing to get at. Please make sure the power is off and the plug is removed from wall socket before you start and do not power up until the casing is back on. Hope this helps.

1 To replace the oven light,
first disconnect the power
at the main fuse or circuit
breaker panel or pull the
plug.
2 Remove the top grille by
taking out the 2 screws
that hold it in place.
3 Next, remove the screw
located above the door
near the center of the
oven that secures the
light housing.
4 Replace the screw.
Connect electric

HOPE THIS HELPS :)

Here is the GE download page for your manual. Page 35 of your  manual gives the light bulb replacment instructions. 

http://genet.geappliances.com/DocSearch/Dispatcher

The bulbs are glued in at the factory. Unplug the microwave and see if you can remove the base of the bulb from the socket with needle nose pliers. You may have to twist the heck out of the bulb base but it should come out. If you do need a new socket it is available at www.geappliances.com under parts and accessories. Or call 1-800-626-2002 for GE factory parts

Remove the light cover /filter opening.Its very easy to remove.The filter will be removed by hand and may give you the best reach.
Please rate this !!

The control circuits for the cooktop lights and the hood fan are spearate. The problem is indeed with the control unit. It's usually caused by either the filaments shorting when the lamp blows or by removing or installing the bulbs while the oven is still plugged into the power line. We regularly repair these nationwide for $32.50. Details of our service, as well as *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk