Pole Position error

Nbrown1

New member
Joined
Aug 7, 2022
Messages
23
Reaction score
1
Location
West Virginia
Greetings, so i recently got a pole position boardset that was said to be working but it's erroring out. It started out saying ram 22, then ram 0, then finally devolved into glitchiness. I'm a bit new to all of this so is it an issue with the boardset or something else?
 
Sounds random error codes. Might try to reseat your edge connector. These boards are tough with crusty custom chip any leaks from the battery on it?
 
Yes, changing error codes usually means poor connections somewhere. Either corroded chip legs, bad chip sockets, or loose or misaligned connection at the interconnect board. You should remove all the socketed chips in column 3 and 4 on the cpu board (where the 10XX custom chips are), clean the chip legs, and reseat.

If you aren't careful, the chips legs can be corroded to the point where they break off, and then you have a much more difficult repair. If you clean and reseat the chips and still have an issue, it's possible that the sockets are just bad also. On most repairs these days I usually replace all the sockets in column 3 and 4, which are the program roms responsible for the game booting and running.
 
I've traced these error codes all the way back to problematic power bricks that needed new bridge rectifiers and a upgraded F3 fuse.
 
Sorry for the late reply, I changed all the fuses reseated the edge connector and I have this error now.
 

Attachments

  • 20241116_225134.jpg
    20241116_225134.jpg
    679.8 KB · Views: 26
IMG_1614.jpeg

Looks similar to the error screen on my pole position 2 pcb.. i didn't found the issue too.. ram error jumps 3, 2, 0.. i swapped a ram but same issue.. it's not a voltage issue or the interconnector…
 
View attachment 783436

Looks similar to the error screen on my pole position 2 pcb.. i didn't found the issue too.. ram error jumps 3, 2, 0.. i swapped a ram but same issue.. it's not a voltage issue or the interconnector…
Strangly I get this error, the rm0 error, and just a glitchy mess when I restart the board. Like one moment it'll be RM, then when I restart the board it'll go to RM0 or the glitchy mess.
 
there's 4 roms in the corner of the CPU board with 4 customs underneath. depending on when your boards were made, you may have terrible sockets, but if you haven't gone through the customs on the CPU and video boards they could be plagued with corrosion and/or have legs breaking off the chips. if those 4 customs aren't firing, the game just simply won't run. people go chemist with those things, I just use dremel wire brush (which itself is a delicate process... I've had chips rocket across the room LOL) because if the legs are brittle and about to break, you'll know for sure then. I've become adept at replacing broken chip legs over the years so it's a pretty ordinary procedure for me.

I think your symptom would suggest the Z80 section is working, so the Z8002s are trying to wake up but the program code isn't running right
 
Back
Top Bottom