microwave oven repairing?

my microwave oven stops heating food items intermitently, i poened it to see whats wrong but everything was fine. i tried tightening the connectors to the magnatron n other connectors, n tested it, it worked, but when i placed it back in its place, it stopped heating again. anybody have real professional solutions???

Answers:
I really don't think Micro-wave repairs are DIY projects, to many things can go wrong. Micro-waves are CHEAPER than there parts.

Other answers:
can i help
can i help
Throw it away. Microwave ovens are cheap. Not worthh fixing. Just replace it, you cheapskate.
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