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This problem is likely the result of a short. To find the short you will need to get the schematic and/or the tech sheet for the wiring. It should be behind the back of the machine.
Here is the schematic -
Then you'll need to unplug the machine and check the wiring for continuity with a multi-meter. This will require patience.
We would start with the control panel to see if it is getting 120 volts (especially when the panel goes blank). If it is you may need to replace the board itself.
Let me know if you would like more information or clarification on the above.