A noise like a microwave housing is knocked is caused by the magnetic field in the transformer outside the oven.
Normally a glass container will not break when used in a microwave oven. It only does, in the case where there are air bubbles inside the glass.
Installing or not installing earthing does not involve the emission of microwaves. However, all microwave ovens should be earthed for safety.
If the oven works, but there is no heat, then the heating element of the microwave oven is inoperative.
This could be caused by rotation motor malfunction, improper fitting of the turntable wheel or debris in the turntable rail.