I have a LC520 upgraded with a 575 logic board... before the logic board recap, it wouldn't even power up
after the recap, it powered, CD and HD spun up, but no chime and no video
I completely recapped the analog board and now, after the power key is pressed, I can hear the power supply clicking and never starting up. I believe it's shorted somewhere
2 problems:
- regarding the analog board, I've checked every capacitor for polarity and it all checks out. all caps were new. what's the next step? how can I test the power supply without attaching the logic board to the rest of the mac?
- after I "ruined" the analog board, I tested the logic board on a working color classic II.. it has the same effect.. powers up, but no video, so I guess the logic board has issues too.. tried different VRAM memory, no effect.. could it be the Egret chip? what's the next step?
after the recap, it powered, CD and HD spun up, but no chime and no video
I completely recapped the analog board and now, after the power key is pressed, I can hear the power supply clicking and never starting up. I believe it's shorted somewhere
2 problems:
- regarding the analog board, I've checked every capacitor for polarity and it all checks out. all caps were new. what's the next step? how can I test the power supply without attaching the logic board to the rest of the mac?
- after I "ruined" the analog board, I tested the logic board on a working color classic II.. it has the same effect.. powers up, but no video, so I guess the logic board has issues too.. tried different VRAM memory, no effect.. could it be the Egret chip? what's the next step?
