Turntables doesn't work and makes horrible noise

open it and check screws. anything that vibrates will sooner or later loosen internal screws. maybe put a locking ring on it if u find it
ManualsLib Makes it easy to find manuals online
serach here for service manual .

see for the turn table obstacle of any screw or something else.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

If the sound is a bit like angry bees but muffled, then the magnetron is on its way out.
Sorry.

call the certified technician to fix the said problem may something is loose during startup of the machine.

Two weeks? This is a warranty problem. The buzzing noise was probably either from high-voltage arcing or an overloaded transformer trying to drive a shorted component. The smell is from something electrical getting fried. Remember it; the next time you smell it, you'll know to pull the plug.

Perhaps the rotating turntable carriage is out of alignment. Ensure that it is concentric.

ge spacemaker XL1800 (JVM 1870BF02) doesn't heat, lights, turntable works.

All:
I have a 2003 Sears Ultra Wave microwave 721.63682300 with a similar problem. A few months ago it started giving off short buzzes when turned on. That stopped but then I noticed that everything took twice as long to heat up. After quite a bit of teardown&inspection I found a circuit break in the inverter board leading to ZD704 diode (pictured). I will now try to find a replacement diode to see if replacing will fix it. Thanks for your postings.

Many thanks to e3enigma above! I removed the synch motor under the turntable; all other microwave functions work fine and the grinding noise is gone, hooray! A trip to the appliance parts store tomorrow for a replacement synchronous motor and all should be well. Thanks again!