My Samsung ME18H704SFG has lost power. I changed out part # DE47-20060A and it worked for 2 weeks and has lost power again?

Microwave Repair
1

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My samsung ME18H704SFG has lost power I changed out part # DE47-20060A and it worked for about two weeks and now it has lost power again and its the same part that is bad

2

When the microwave lost power, how long of a heating cycle was being done and what was being heated up? Also, have you noticed if there has been any abnormal discoloration inside of the microwave?