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Worth buying this board?

laphlaw said:
I’m a total beginner at repairs. Does this board look like it’s worth repairing?

https://www.ebay.com/itm/1563574991...V9hs2WqR6q&var=&widget_ver=artemis&media=COPY
Click to expand...

Nope. They’re not even selling you the full game. It looks like just the A board (the actual game data is on the B board, and security on the C board). Also diagnosing this would require about $100 in custom parts to allow you to probe the A board (otherwise it’s under the B and C stack). https://www.ebay.com/itm/283424760472

Anyway, it’s probably a dead custom chip. The big one they covered with tape. Can you find a donor and replace it?

Photo of the board without tape… https://jammarcade.net/cps1-dash-a-board-repair-log/

Other info/repairs
https://jammarcade.net/tag/cps1/

Not to mention, that seller pulls shit like this a lot.
 
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do you think its worth buying to try and repair CPS1 boards in general, or are these boards basically waiting to die?
 
There's some unknown error on cps1 that kills the custom graphics chips on the early long boards and sometimes short boards.
They seem to have fixed whatever it was by cps2 as the chips are identical.
So that's leading me to believe either a production error in manufacturing specs or a board fault issue.
Either way. I would avoid cps1 repairs unless you have a donor from a thrashed cps2 A or until someone decides to reproduce the chips and save all those dead boards.
 
laphlaw said:
do you think its worth buying to try and repair CPS1 boards in general, or are these boards basically waiting to die?
Click to expand...
I do! It’s just not something you should try first. Find some dead bootlegs with no custom chips and only cheap/uniqutous logic driving them. Get some data sheets and a logic probe and go to town
 
Cps2 is fully documented and easier to diagnose.
There's a glut of acid battery damaged boards that can be used as donors.

I would like to see someone repairing cps1 boards. Its just not an easy starting point.

As above. Older games will be easiest to diagnose.
 
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