roothorick
Active member
So my ST-V board arrived... and it's stone dead. The LED on the board comes on, but I get nothing onscreen and no audio. The onboard battery was low (1.5v) so I swapped it with one out of a computer that I tested first (3.03v)... no change.
The first run, I unknowingly had the voltages pretty high. +5V was over 6, -5V was about -5.98, +12V was above 14 I think. The other two boards I have (Gunbird and Lucky n Wild) didn't seem to mind the raised voltages at all -- in fact since Gunbird was working I kinda assumed.... I really wish I had checked now. I don't know for sure if that's what killed it, but... lesson learned.
My instincts say I should verify the BIOS ROM, but I have no idea how to do that. Even if I had a reader/burner, it has a hacked universal BIOS, so I don't have a ROM to compare it against.
I thought tomorrow I'd borrow the logic probe from work and check for signs of life around the board. I'm not sure what else to try.
The first run, I unknowingly had the voltages pretty high. +5V was over 6, -5V was about -5.98, +12V was above 14 I think. The other two boards I have (Gunbird and Lucky n Wild) didn't seem to mind the raised voltages at all -- in fact since Gunbird was working I kinda assumed.... I really wish I had checked now. I don't know for sure if that's what killed it, but... lesson learned.
My instincts say I should verify the BIOS ROM, but I have no idea how to do that. Even if I had a reader/burner, it has a hacked universal BIOS, so I don't have a ROM to compare it against.
I thought tomorrow I'd borrow the logic probe from work and check for signs of life around the board. I'm not sure what else to try.

