The turn table stopped turning and the unit stopped heating.

The table motor belt may have detached which stops table from rotating and the magnetron control shuts off the heating if table does not move. Need model number etc for the microwave. It is not recommended to open the units unless you are qualified technician or understand the operation of the microwave oven. The voltages and waves can harm human body.

The real clue here is strangely enough the table not turning.

All units have a switch in the side (usually the right side) of the cabinet--when door is opened it allows the unit to work but will not heat or the table (usually both) will not work.

It has to be got at from the inside of the unit--little plastic holder with the switch which looks like a leaf switch.

What I have seen several times (including a unit I own) is that from countless opening and closing the door the holder may break or even melt and the contacts on the switch no longer are in position to work when door is open.

The purpose of such a switch is simple---it prevents the unit from being used if the door is OPEN.

Not a hard or expensive repair

Almost certain if microwave still heats a bad motor or gear issue inside the unit--if unit will not heat the safety switch in the side that the door engages is the cause of the wheel or platter not turning--prevents unit from use if door open.

Check the three microswitches in the latch assembly.

What you probably hear is the fan. If it's not heating the problem is almost certainly the magnetron. The magnetron is the main component in every microwave and can be very expensive tp replace. You'll be better off buying a new microwave. The prices on new ones have dropped dramatically, I saw a 700 watt unit selling for $50.00.

it sounds like it one of your micro-switches inside that control the power to the doors, if one of the switches is bad, it would cut the power , the panenl will light, the turn table will work, the fan will turn on , but you will not get any heat at all, micro-switches run depending onthe unit from 5-10 bucks, when you open the unit you will see the one that is bad, is usually bent or the connector might be burn or melt, good luck..!

my microwave 1640GB from GE suddenly cannot heat food and make some noisy sound. as it is mounting in the closet, it is not easy to replace. any solutions or suggestion

interlock switches.. more than likely it is the monitor switch in the middle that needs to be replaced

if the microwave still heats then the turn table motor will need to be replaced.. very easy repair

open microve cover find magnetron crimp connections to magnetron