Hi all
I've been repairing a long dead Golden Axe board and after patching several gouged traces on the underside (mainly related to 68K), the damn thing sprung to life. Although, complete with some pronounced sprite glitching and an odd streaky tinted overlay to the video. I replaced a dead Sony RAM at F4 to clear up the sprite issues, but am left with the strange washed out streaky tint effect over the whole picture..
I wondered if it might be color RAM, but that checks out as "GOOD" in the service menu. In fact, all the testable RAM does. To be fair, when I think palette ram issues, I reckon there'd be more obvious problems with sprite and background palettes generally. It feels more like bad analog stage interference, but would REALLY appreciate any help on this as it has me stumped. Anyone else seen this type of thing before?
I've linked a video, trying to capture the effect. Also take a look at the still shot of the colour bars. Green looks fairly nominal, but red/blue and as expected, white is looking pretty sick. The vertical darker tones seen through the white and red bars move/creep as it sits on that screen. The focus is compromised with the amount of colour bleed/flare going on. and I don't think the surround is supposed to be pink!!? In game, the whole effect is dynamic to whatever is on screen swooshing around like fast moving mist.. I hope I'm explaining this okay.
View: https://youtu.be/29udfZ3erH0
Thanks in advance
I've been repairing a long dead Golden Axe board and after patching several gouged traces on the underside (mainly related to 68K), the damn thing sprung to life. Although, complete with some pronounced sprite glitching and an odd streaky tinted overlay to the video. I replaced a dead Sony RAM at F4 to clear up the sprite issues, but am left with the strange washed out streaky tint effect over the whole picture..
I wondered if it might be color RAM, but that checks out as "GOOD" in the service menu. In fact, all the testable RAM does. To be fair, when I think palette ram issues, I reckon there'd be more obvious problems with sprite and background palettes generally. It feels more like bad analog stage interference, but would REALLY appreciate any help on this as it has me stumped. Anyone else seen this type of thing before?
I've linked a video, trying to capture the effect. Also take a look at the still shot of the colour bars. Green looks fairly nominal, but red/blue and as expected, white is looking pretty sick. The vertical darker tones seen through the white and red bars move/creep as it sits on that screen. The focus is compromised with the amount of colour bleed/flare going on. and I don't think the surround is supposed to be pink!!? In game, the whole effect is dynamic to whatever is on screen swooshing around like fast moving mist.. I hope I'm explaining this okay.
Thanks in advance
