Here is my solution:
1.remove the sliver panel of from the back of the machine, tie the white bracket A back tho the plates.
2. There is blue color wire B which was disconnected from the black adapter by vibration of the machine. I use an extention wire C to conect the both ends to the black adapter again.
Samsung need to consider to recall those wahsers. It's a thousand dollars unit. The root cause is the screw for the bracket is loosing, the wire was damaged by the vibration!!!
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