Hello, I just picked up a Silverball Mania (unworking) ... I am an EM guy so really need some input here ... Is this acid damage/corrosion on bottom edge of MPU board? (photos 1 and 2) ... Battery looks good (photos 3 and 4) .... maybe the MPU was taken out of another game that had battery acid damage??? Is it possible to repair this? how difficult? saw a new board on EBay for $180 (photo 5) ... seems very reasonable ... are all the new boards about the same or is one brand a lot better ? THANK YOU !!!!

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MPU cheaper > OK... good to know !
I will check power supply and voltages .. and connectors (have a buddy who is good with that stuff) ... and he is good at soldering so hope we can save board if problem ... or fix connectors ...
capacitor not battery > told you I needed help ... LOL ...
THANK YOU SO MUCH !!!!!

Battery > was it on the bottom of MPU board ? (that would explain the corrosion there and the couple of holes with solder around them ) ... and don't see it remotely mounted so did previous owner do the chip that stores all the info ??

THANKS FOR ALL THE INFO ...
My buddy jimpin1967 came over last night and we tested the voltages ... all were good except on the Solenoid driver voltage board (230V > full power and the adjustment knob didn't reduce voltage) ... Jim said he would solder in new parts there for me ... Game still isn't booting so Jim put my MPU in his working Spy Hunter and it didn't work there either... we going to try getting one new RAM chip (that previous owner had problem with before) ... and if that doesn't fix it > I am going to do what Grizlyrig suggested and buy a new board ... don't want to inconvenience my buddy too much, want to play the pin and don't want bunch of problems down the road. I will update this post with the results ...
THANKS AGAIN !!!

P.S. also previous pinball technician that worked on it removed all the caps on switches under playfield ... Jim says those need to be there ... ? so going to do that also

AAAAH ... Interesting ... Thanks for info ! BTW > Madison, WI is a great town !

UPDATE > my buddy jimpin1967 tried switching the one RAM chip with a new one > board still didn't work ... so I got a new board ... plugged it in and the GAME WORKS !!! ... I only played a few games (as the voltage is testing too high) ... so jimpin1967 is going to replace the bad components on that board (the board that sends power to the displays) ...

THANK YOU ALL FOR THE GOOD ADVICE and INFORMATION !!!