I would start by checking ALL of the fuses, and when I say checking, I mean taking them out and verifying they are the correct value, and also do a continuity test. Also do a complete visual check, especially around the batteries on the CPU board. Check all the connectors (see if any look burnt or broken), inspect the power driver board, etc. If you get your DMD working, then go into diagnostics and see if there are any errors. I doubt the reset issue would be from low wall voltage, way more likely to be something else. Info here and other troubleshooting guides like on Pinwiki are a great resource to have!

Great choice on your machine! Good luck!

I had a World Cup that did this after I switched it over to a long extension cord.

Check if there's something heavy like a space heater running on the same breaker.

Sounds crazy but it fixed my problem.
After taking it off the extension cord.
Then it happen to my Whitewater every time my son had his window air condition running WW would reset.

Reseat all the gray ribbon cables in the head. Careful not to get the connectors shifted over one pin or row. Don't forget the little short one that goes from WPC board to driver board.

Reseat J101, J102, J114 on the driver board and J210 on the MPU first and look for any burnt pins on these connectors.