Product review (5 stars): GE Profile Spacemaker Series JVM1790SK INTERIOR LIGHT REPLACEMENT
GE Profile Spacemaker Series JVM1790SK INTERIOR LIGHT

Purchased in 2008, and my family loves it.  Because of the many features it has, we use it more than any other microwave we've owned. We've had no problems with it - except the light bulbs.  Both are easily replaced without removing the unit from the wall - if so mounted.  UNPLUG THE POWER CORD before proceeding with installing either bulb.

The INTERIOR LIGHT is accessed by removing the top vent cover - the one above the door.  Remove the 3-screws - 2-on the top, and one on the left side, and located about  in from the front edge of the metal housing surrounding the microwave.  NOTE: If the microwave is in a cabinet which covers the top and side screws, you can CHOSE to 'break' the plastic tabs which secure the top vent cover at those points - it will allow you access to the interior bulb without removing the unit.  The bottom of the vent cover has three offset plastic spring tabs that allow you to pull the vent cover off - toward you as you face the microwave.  My top and side tabs were previously broken by someone trying to get the cover off without removing the screws...

Once you have removed the top vent cover, look for a phillip-head screw just above the center of the doorframe - at the entrance of the duct going to the exhaust fan.  This screw secures the interior light bulb bracket. Remove the screw, and lift the bracket out - the light bulb and wires will be attached.  Pull the little bulb straight out of the socket  it has two round pins that make the electrical connection in the bulb socket.

My unit came with a 20-W Halogen bulb - I bought a replacement from Home Depot for about $5.00.  Insert the new bulb, but don't touch bulb with your bare fingers - I used a paper towel to keep the oils on my skin from attaching to the bulb's surface - oils concentrate heat and therefore shorten the life of the bulb.  Reinstall the light bulb bracket, vent cover, plug-in the power cord, and reset the clock, etc...