I just bought an Alien Poker as my first project. i just replaced the mpu/driver board with a RottenDog board with NVRAM (no batteries needed ). When I power the machine on, I get lights on the playfield, but the displays don't go into audit mode or even power.

I am looking for some assistance on where to start troubleshooting. Thx.

I haven't. This may sound like a dumb question, but how would I do that?? Thx.

To Try and Eliminate the problem, I swapped the power board with one I know works (a rottendog power board from my Firepower). Thta didn't help. I only get power to the static lights. I get nothing on the playfield or the displays.

Last time I had this issue (in my firepower), it was a bad power board. Since that doesn't seem to be my issue I am thinking something with the transformer, etc.

Any guidance would be appreciated. Thx.

Thox for the replys. Yes, I only get GI lites. I will check the voltage on 3j1 as well as 3J5 for the +100v. I didn't try with the original board as the guy I purchased it from said it had battery corrosion damage. When I removed the old board, I did notice that the battery holder was loose and not fully soldered to the board.

If the voltage looks ok, I will remove/resolder the battery holder and see if the old board works.

Thx for all the input. I figured this one out. Looks like I had a bad connector from the power board to the mpu. The 12v connection was not seeded correctly. Once I fixed that, the machine booted up just fine.

Now, on to the next issue. None of the coin door switches are registering credits. I suspect I need to validate all the configs since I am using NVRAM instead of a battery. I will also run diagnostics to see if that reveals anything.