0's on the displays sometimes. sometimes not. we were playing other games when we heard this clunking noise. turns out it was el dorado apparently rebooting multiple times so I went and turned it off. opened back box. reseated connectors and it stopped rebooting but there were no displays. turned it off and on again and the zeros came back on but it wouldnt take credits or start a game. opened coin door, pulled out the coin door switch into service position and it came on normal...in attract mode. went back to another game then the same thing happened. it's basically in that state now. doesnt get into attract or playable mode. i had a bad experience with another game reflowing finger pads so I am reluctant to just try that for kicks. i dont have a manual and would rather just buy a board and be done with it if possible. any suggestions for a quick repair would be appreciated. the time is more important than the cost of repair.

thanks guys. i will report back

5 volts dead on PSB. i had one kicking around plugged it in and it reacted differently but still didnt work. contact pads on mpu connector that carries 5 volts were pretty corroded and fugged up. cleaned all contact pads on mpu, performed visual inspection...no dice. had an mpu I bought for volcano (which i gave up on) kicking around and discovered it could be used. put it in, worked for a while then crapped out again as I was waxing the PF preparing for my triumphant run of relentless testing with a johnny black on the rocks and buglers on the way. spun around in circles for a few more hours and gave up for the night. went back last night and tried swapping the psb to mpu connector that carries 5v. nope. disconnected displays one by one. nothing. swapped in driver board. nada. decided to go back to the 5v test. 4.1. discovered the pot (I have no schematic or experience). touched it and got scratchy sound from speaker to fluctuate. cleaned pot. put meter on TP 5V. adjusted to 5.12. BAM!