First off. if you have good 5 volts at the battery box or close you need a new ram chip. Cheap and easy fix and a common failure point. Will act like bad batteries when it goes. You get the open door message and no boot.

Also recap and repin your original power supply. C2 is a known failure point along with all elec. caps, replace all the caps on that board. They only have a life of about 10 years.
Then play your fingers off.
Cheers man. easy fix.

those power output values are fine. replace the ram chip and you are good to go. Replace it with nvram then no batteries ever. Super easy to do on your game. just swap chips.
Batteries ruin more boards then anything else period. always good to go nvram.
Cheers

Thanks. Love the poster too.
And you can swap the ram chips but better to not. They are static sensitive and can be damaged by misshandling or static charge etc. They are quite cheap.

You bet 2 birds for sure. Yes the nvram chip goes into the socket that your ram is in now. it is right around the battery box.
I can dig up a picture for you or better yet look in your manual at the cpu picture and it will be obvious what chip it is. If you do not have a manual you should get one for each game you have but in the meantime go to IPDB and dl one for your files.
I believe it is a 6264 chip if I remember right.
Get 2 nvram chips and do your tommy as well. Best investment you can make in your pins.
Good luck. Easy fix my friend. Go nvram and never look back. get a good chip/IC remover too.

Makes chip swaps easy. Plus touch ground or wear a ground strap before touching any logic chips. Oh and make sure game is off.

Ah you found the real problem...........take a picture of the socket and the corrosion and post for me to see or PM me. Batteries outgas and cause all kinds of trouble. If the socket is damaged it must be replaced and battery acid neutralized asap.
Are you up to board work? Do not install any more chips in that socket until we determine if its bad. battery acid ruins everything.

If the corrosion looks white or green the socket needs to be repalced and any chips or affected components tossed and replaced.
Do not use the old chips no matter how clean they may look. Logic is cheap, boards are not.
hang in there we get u fixed up.

its funny. batteries seem to take out what they want, but usually follow the ground path around the board and up wires and down on to everything.

But I have seen bad acid damage on boards that do not even have batteries on them destroyed from outgassing batteries below or beside them. Crazy stuff!

ok man. we have good and bad news. The good is its not serious and it needs a socket replacement and new ram chip or nvram. No way around it you cannot get that socket clean the way it is.

The bad news is you need someone to do it for you. Is there someone near you who does board repairs? Its an easy fix with the right equipment.
Cheap too minus the labor charge.

yuuuup

No sweat. Where are you located? Makes a big difference. The game will be fine as long as its the only corroded socket. No worries man. easy fix. Remember your power supply needs work too c2 is leaking . If any caps are leaking they MUST be replaced.
best to do them all on that board.

Yup we need a picture of that board and the original power supply needs to be repaired.

No matter what it does now you need to fix the acid damage in that socket and everywhere else or everything means nothing. It MUST be removed and the surface sanded and then a vinegar solution applied followed by water clean up with iso final rinse. Then re-populate bad components with all new and go from there.

Sorry , but thats what has to happen. Do not turn it on anymore until boards are repaired. You will just damage more things and cause yourself grief.

Awww buddy. thats pretty bad. I can see white furr and corrosion everywhere. The cpu and socket , the crystal and the components just under the left of the battery and all the eprom sockets and ram socket all need to be done at the least and probably more.
You need to send the board to someone. It can be saved it just needs to be done asap and correctly or it will only get worse.

Sorry to be the bearer of bad news.