UMK3 Wolf Board Issues/Need Help, Advice

[kinooshi823]

In search of a MK3 board, someone reached out to me but described these issues with the board--Bad graphics and no sound. On boot, U10, 11 and 13 fail before "ram chips bad" error shows up. The board is playable though. I don't know if it is worth investing in. So any advice, where to procure roms? Or would burning new roms work? Let me know.

 

[MickyMac]

Hi, you could purchase a cheap rom dumper like a tl866 and verify the bad eproms to the set in mame.

If bad, get a uv lamp to wipe the roms and reprogram them.

For the ram, add flux to the pins and tap with an iron. Otherwise replace the rams.

 

[MudGuts83]

This might help. https://www.jammarcade.net/mortal-kombat-3-repair-log/

 

[pzlate]

the row that's checking bad is the SOJ RAM near the top left of the board (bottom left in the OP's picture) I don't like those jumper wires near that area either lol.
e: Oh I see there's more on the bottom too, I'd stay away from this board unless it's ungodly cheap and you want to fix a lot of destroyed traces.

 

[kinooshi823]

the row that's checking bad is the SOJ RAM near the top left of the board (bottom left in the OP's picture) I don't like those jumper wires near that area either lol.
e: Oh I see there's more on the bottom too, I'd stay away from this board unless it's ungodly cheap and you want to fix a lot of destroyed traces.

I ended up buying the board but man I could not fix it until I saw MudGuts' link. Either way I had purchase another UMK3 board in much better condition in August. I just had the broken board for parts now. Also, I tried to reburn the rom chips and they all failed so those chips are useless too