JVM1790BKC - Instructions

I went for the cheap things first. Ohmmeter showed one of the thermostats in the magnetron compartment was open. I ordered and replaced all three thermostats. Still no heat. I took the unit off the wall (aaarrgh!) and checked the oven cavity thermal cutout. It said 7 ohms. I tested by shorting the wires together, but still no heat. So, I ordered the magnetron and diode cable. When replacing the diode cable (be sure to discharge the big cap!) either I broke it, or it was already damaged. It came off in two pieces. The new diode cable was re-enforced with thick heat shrink tubing, to prevent such breaking. You need a very short screwdriver to replace the magnetron. Now, all fixed! ~$150. A new one lists for $2000, installed in the overhead. My wife thinks I am a genius.

Our Microwave’s Halogen Light Bulb burned out.

We looked in our manual and were able to take the cover off to get to the bulb, but we were unable to unscrew the builb and the bulb in the manual did not match the size of the one you offer (size and part number were different)

We called 1-888-738-4871.

Gentleman who answered was very knowledgeable: answered all of our questions (PULL THE OLD BULB OUT) and assisted us by ordering replacement bulbs.

We (more importantly my wife) were very pleased with the result.

Ridiculously easy, unscrew, and change bulbs. Having the correct bulbs made all the difference, I did not have to waste time looking for the correct one.

Replace the fuses

Removed old bulbs replaced with new. Bulb fit perfect thank you

Removed screw holding faceplate that covered bulbs. Next inserted new bulbs into sockets.
Turned on surface light to insure they worked - they did. Re-attached faceplate.

It was just a matter of removing the old bulb and easily putting the new one in place. Very simple repair and the bulb was received amazingly fast. Was no doubt the best service I have received and I appreciate the quick response.

Initial failure of over range microwave Aug 3rd. Control Panel worked but no heat. Took to local LG authoriaed local repair place. They fixed it quickly and we re-installed it. Worked fine for 2 months then had similar failure again. Agaim took to same authorized repairer. They kept unit for 3 months but finally concluded theu could not fix it and suggested we contact LG for a partial refund. When they tested the unit during re-assembly in my presence, there was a blue flash and the fuse blew. Since we had built a custom tile mural back splash around this unit, I brought it home, ordered a number of time delay fuses new capacitor and two new high voltage diodes. However, using my Fluke DMM, I checked the existing capacitor and high voltage diode and they checked OK so I just replaced the time delay fuse. The high voltage transformer leads had 2 possible ways to connect to capacitor and diode. Tried one way, plugged unit in and turned it on, and immediatly blew the fuse. Replaced the fuse and reversed the high voltage transformer connections,amd turned unit pn, and it worked perfectly. Since we had experienced several power failures during the time of the original failure, the repairer concluded that power spikes might be at fault, so I also purchased a TrippLite ISOBAR4ULTRA 3300 Joule surge protector between wall outlet and microwave, and re-installed over range. It has worked perfectly since.

Removed the glass shield and inserted the 2 bulbs. Then replaced the glass shield.

The staff were terrific. Thanks so much as it had a happy ending.

Anita

change bulb

Inside "cavity" bulb was a PITA. Need to remove top decorative trim (2 screws and tabs) to access bulb housing. Broke 1 screw tab so be careful (Wiggle it more). Acccess to bulb housing was made for younger smaller hands, attached by 1 screw. Remove screw, rotate housing, replace bulb. Reverse proceedure. Outside bulb, cake...1 screw, drop lens replace bulb, your done.

took glass cover off being an electrician and saw lamp or bulb was burned out. googled your site and with model number.went on partselect found lamp,orderd it.2 days later lamp arived installed lamp. So easy no running around or making several calls

Used a phillips screwdriver to remove the screw holding the light cover in place. Removed the two bulbs and replaced them. Closed the cover and tightened the screw

Screw out-old bulb out- new bulb in- screw back in!!!!!

Replaced the fuse. Result; did not fix the problem.