Hi everyone,
My SWC was working, until recently I try to turn it on, it boot up to menu but selftest "0" Mb and cartridge can't be run or detected on SWC cartridge slot. So manage to open it, found battery battery leakage and corroded PCB some area(both mainboard and DRAM module). then I try to remove battery and clean it up and fix broken track on DRAM module. boot up nothing changed. later bad thing happen C2 capacity(2200uf) +ve leg lifted(supply come from SNES I believe) and touching PCB(causing voltage spike I guess) which now black screen when power on. and found U4 GAL20V8A heat up(probably dead I guess)..
Can someone share dump for GAL20V8A ? so that I get this IC and programmer to proceed troubleshooting
need dumps for as well (U2 AMI 18CV8PC-25, U3 PEEL18CV8P -25, U6 M27C2001-15FI) in case one of these dead too
I'm not sure if other ICs got killed, but main objective is to get unit to boot up first then continue troubleshooting.
If remove U2 AMI 18CV8PC-25, U3 PEEL18CV8P -25, U4 GAL20V8A, U7 SRM20256LC-10, U13 ST10198S. will SWC boot up?
Really hope someone can help me fix this rare unit