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Same as yours... Error A0 with the 3 sram chips in red... The rest of the sound chips in yellow... And the message Sound system error, sram failure. Exact same screen as the openings post. Game runs fine otherwise... I burned new sound roms just to be sure, but no luck there either...

Unfortunately, replacing the SRAM cips did not solve my issue... Or I'm having bad solder joints too... I checked the power and GND pins and all chips get 5V and GND is connected properly. Do you have any more info on whats connected to the SRAMs or where to check next? Thank you for any help! :-)

Allright, thank you for the heads up! I'm not doing the soldering myself, it's too tight as you mentioned... My brother will do that, he's an electronic technician, but I will pass him the info! Thanks! I found the ISSI chips at digikey... I hope they're alright? I will let you guys know how...

@MagicianLord77 Did you ever get to test it with the new SRAMs? I'm facing the same problem with a mk4 pcb I bought as non working... I solved some other problems the board had, but now I'm getting this error with 10 audio "bongs"... Game boots and runs with no sound... I have allready ordered...