texasmame
Well-known member
Get Sinistar. "We used to play it but then it died and we haven't messed with it."
Replace power supply fuses with known good; two wrapped in foil and 4 of 5 were wrong AMP. Replace fried BR2. Reflow/clean headers.
Test voltages at main PCB - good now.
Multiple RAM errors. Replace all RAM since I have them on hand.
Now rug pattern repeating.
Turn attention to ROM board. WTF? (see pic)
Put #5 and #10 ROMs back where they go - boots properly!
Replace power supply fuses with known good; two wrapped in foil and 4 of 5 were wrong AMP. Replace fried BR2. Reflow/clean headers.
Test voltages at main PCB - good now.
Multiple RAM errors. Replace all RAM since I have them on hand.
Now rug pattern repeating.
Turn attention to ROM board. WTF? (see pic)
Put #5 and #10 ROMs back where they go - boots properly!

