Bally V2000 will not cycle past Startup Ram Check Screen

[Amechanic]

I have a 3 board stack from a Bally V2000 that will not cycle past the Ram check screen on startup? It beep on power up the the screen comes on saying game version (joker poker), then displays the ram check menu 0-5 with some numbers next to them. Then after a second or two the screen goes black and starts all over again. It will do this until I shut it off. I tested the board stack in my V2000, and it does the same thing..

The board stack has had a 1/2 AA lithium battery installed, and I know that's not correct, but I don't think it's causing the problem, or it is?? I see very little acid damage from the old battery, just a couple green legs on a couple of soldered on IC's..  This is one of the nicer 3 board stacks I've seen.

Thanks, Gary

[Badbaud]

You still have the charging resistor for a NiCad battery. It gets changed to a diode if you put a Lithium battery in.

also check the RAM IC socket for corrosion.

[Amechanic]

Sorry I never came back and finished this post. I installed the correct battery and ended up changing out three IC sockets. Once I replace the damaged sockets and put everything back together the problem was resolved and machine worked 100%.

FYI a Quick note. The original IC sockets on a lot of these Bally boards only make contact on one side of the Eproms legs.. Newer sockets have a better two sided connection. 

[Badbaud]

Ya, those older sockets corrode easily. What's nice is you can pop the plastic housing off and expose all of the pins.

Then a little solder and heat and you can remove each pin easily.

I always replace the sockets with Amp dual wipe sockets from Jameco Electronics.