Microwave primo mg4 not heating? if your microwave functions correctly but not heating? then there some few parts to check
1)unplug the microwave from the power line,
2)discharge the capacitor with isolated tools.
3)check the network of HIGH volt parts (transformer, capacitor, fuse, diode, Megatron)
after fixing or while fixing make sure you put the cover back, avoid any exposure from the MEGATRON (RADIATIONS)
3)change the broken parts with exactly the same spare parts