After I switch on the oven, the turn table rotates but no heat generated.

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.

microwave not heating YouTube

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.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ';
';

The turn table motor of your microwave is defective already and also the magnetron - the source of generated heat of the microwave is also defective. But before assuming that magnetron is dead, check the high voltage fuse it may be blown and replace the fuse (if it is blown) it with similar rating. I hope I help you with your microwave problem.

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

[\[\[\[\[\[\[\[\[\[\[\[\

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101=--=

Test the high voltage capacitor, the rectifier diode.or the magnetron.

The diode and capacitors can br tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, even if power is off. Capacitors can get discharged by shorting their two contacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

if micro. new then its defective
if micro. old then you need replacement or service the heating element and turn table motor