Recent content by mrmekon

I sold mine without ever having fixed it, but in my case I had both an HD and a compactflash version, and two full sets of ROMs, and every combination did the same thing. And my voltage looked fine at the board, and I tried raising it and lowering it slightly. I was thinking it was probably my...

A proper replacement power supply from Happ is $80... a generic 200W AT power supply can be found for <$10. Is there any reason why a generic PC AT power supply won't work, as long as I verify it can source 20A on +5 and 8A on +12?

+5: +5.02V -5: -5.18V 12v: +12.22V Increasing +5 by 0.01V makes the 'overvoltage' start flickering.

The problem came back :(. Random resetting with the new ROMs. It seems to be less often than before, but the game is still unplayable. I watched the +5V, -5V, and +12V lines on a multimeter during resets, and none of them drop. The multimeter might not catch an instantaneous drop though...

Thanks everyone for the help! Turns out the power supply did have an adjuster, and a slight adjustment fixed the low voltage light. That didn't fix the game, but a new Area 51/Maximum Force kit from toplessZ did the trick! All seems to be good now... if only I knew how to move the thing down...

Found the watchdog disable and the self-test switch, but both of them are just pads so I'll have to solder some wires on tomorrow and test them. I also found the operator's manual, which says the flashing green light I have means "Bad ROMs"! That could certainly be an issue... The manual...

Updated symptoms: I used 'dd' in OS X to do a block copy of the old Area 51 drive to a spare 40 gig drive I had. I set the jumpers to '32GB limit' mode, plugged it in, and turned it on. Booted straight into the game, and I played joyously through two whole levels... then it froze. Graphics...

That's good to hear, since I already have the Max Force kit on order. I never would have associated an unreliable drive with resets, I would expect that to show an error. Before I put in new ROMs, is there anything else it could be? If it's something more serious I don't want to fry my...

I just got a non-working Area 51 upright that I'm trying to diagnose. I know *nothing* about coin-ops but quite a bit about the hardware (I'm an embedded systems engineer), so if you have any tips please be specific. Googling hasn't turned up anything relevant. The first few times I powered...