AEChadwick
Well-known member
I have been fooling around with my PowerBook 520c (my first powerbook!); installed BlueSCSI, and working on a PRAM battery replacement (will post results if successful). I love this hardware, and it's running beautifully EXCEPT...
after a few minutes the screen blanks out to blue. Not black, it does not turn off, it goes blue-grey. Clip attached (that's how reliably it happens, i just waited a few seconds). The cables are all connected and solid. Jiggling the interconnect cable might bring video back, but only for a few seconds.
I have pulled apart the entire thing; i have the advantage of having parts from a 520 (not c) to swap parts. I have swapped the Interconnect Board, Inverter Board, Logic Board cable, I even swapped the LCDs, back and forth. I think i have confirmed this only happens with the color LCD. The black-and-white LCD does NOT blank out, B/W LCD will run for hours and it runs with any of the parts. To wit, the boards and cables seem solid. This seems to be a problem with specifically the color LCD.
The only capacitors I can see on the LCD look fine, but wtf do i know? are there more hidden underneath? should I send it to get recapped? or, is this just "30 years old, dude, thank the screen for its service and move on."
i'm a longtime lurker, i appreciate the hell out of this community; i hope my travails help other folks diagnose things.
after a few minutes the screen blanks out to blue. Not black, it does not turn off, it goes blue-grey. Clip attached (that's how reliably it happens, i just waited a few seconds). The cables are all connected and solid. Jiggling the interconnect cable might bring video back, but only for a few seconds.
I have pulled apart the entire thing; i have the advantage of having parts from a 520 (not c) to swap parts. I have swapped the Interconnect Board, Inverter Board, Logic Board cable, I even swapped the LCDs, back and forth. I think i have confirmed this only happens with the color LCD. The black-and-white LCD does NOT blank out, B/W LCD will run for hours and it runs with any of the parts. To wit, the boards and cables seem solid. This seems to be a problem with specifically the color LCD.
The only capacitors I can see on the LCD look fine, but wtf do i know? are there more hidden underneath? should I send it to get recapped? or, is this just "30 years old, dude, thank the screen for its service and move on."
i'm a longtime lurker, i appreciate the hell out of this community; i hope my travails help other folks diagnose things.