Classic ii monitor flicker

[itdude99]

Howdy all. I am trying to revive this Mac. Things I have done so far. Removed ROMs and memory. Put in dishwasher. Put everything back. Same issue. Please see video for flickering issue. 

I don’t know if the logic board works. Can I place the classic ii logic board into the case/monitor of an SE/30?  I am not going to swap analogue board. I am afraid to touch all that CRR stuff. 

Thanks in advance!

Jim

 

[techknight]

That is the power supply cycling over and over again. Probably caps. 

Both the analog board and logic board needs cleaned and fully recapped before you can even begin troubleshooting. 

 

[itdude99]

Thanks techknight, I found the wiki.86kmla.org page regarding the capacitors for the logic board.  Is there a similar placer to find the capacitors for the analog board?  Also any advice on where to buy or what else I should be reading?  This is my first attempt at this type of repair.  Also do you think I can try out the Classic II logic board in a working SE or SE/30 case?

 

[Jinnai]

yeah it is caps. I had good results after just washing it under running water (tried spraying it which didn't work) and drying totally. replacing caps you get them from mouser or digikey, but when I did it I lifted pads and had to remake traces with thin wire, they're a bit difficult to get off.

 

[bibilit]

Analog board capacitors:

http://www.maccaps.com/MacCaps/Capacitor_Reference/Entries/1990/10/15_Macintosh_Classic_Analog_Board.html

You can swap the Logic board with a Classic II, not with any other model.