Here's what I initially came into: The game pcb would be lit, would play blind, spot killer would light here and there, no picture, good neck glow.
I turned the machine on and off a few times, checking various things, changing brightness, contrast (turning both down), checking x & y output. No changes.
I turned the machine on again, now the machine would sound like it is beeping, timed with the spot killer light flashing, lights on the control panel flashing at the same speed. No picture, good neck glow.
I powered off and on a few times while taking voltage readings. +5v to the game board was around 4.80v I adjusted up to around +5, now the game is playing blind again.
It's back to square one. The spot killer light faintly comes on, back off, comes on. neck glow is constant. You can almost hear a sound like it trying to do something, coming from the Power section of the G05 (not the HV cage).
My first guess is to shotgun the power supply board on it. It's disgusting. I'm frankly not sure how it even ran. Two of the caps are for sure bulging on it. I will probably replace the transistors too. Beyond that I figured I'd go ahead and replace the caps on the deflection board and the bridge rectifier. There's no blown fuses or burned components anywhere. In fact, aside from the power supply board, the rest of the cab and pcbs are very clean.
Does anyone else have any thoughts on what may be happening?
I turned the machine on and off a few times, checking various things, changing brightness, contrast (turning both down), checking x & y output. No changes.
I turned the machine on again, now the machine would sound like it is beeping, timed with the spot killer light flashing, lights on the control panel flashing at the same speed. No picture, good neck glow.
I powered off and on a few times while taking voltage readings. +5v to the game board was around 4.80v I adjusted up to around +5, now the game is playing blind again.
It's back to square one. The spot killer light faintly comes on, back off, comes on. neck glow is constant. You can almost hear a sound like it trying to do something, coming from the Power section of the G05 (not the HV cage).
My first guess is to shotgun the power supply board on it. It's disgusting. I'm frankly not sure how it even ran. Two of the caps are for sure bulging on it. I will probably replace the transistors too. Beyond that I figured I'd go ahead and replace the caps on the deflection board and the bridge rectifier. There's no blown fuses or burned components anywhere. In fact, aside from the power supply board, the rest of the cab and pcbs are very clean.
Does anyone else have any thoughts on what may be happening?


