Mac Classic Display Repair

#1 Tue, 6 Oct 2015 - 02:05

I have a Mac Classic that I purchased in 1991. It was my only computer till 1998 when I placed it in its carrying bag and stored it in a closet. Sometime in the 2000s I started it up successfully. On the next attempt I think a question mark came up.

Over the weekend I tried to start it up and heard the floppy spin along with the HD. No bong sound though.

Turning the brightness up showed a thin horizontal line about 5 inches long. I've attached the image.

I have the case open and there's no obvious damage.

So I don't have the heart to trash this link to my past. I'm going to trouble shoot the display first. I've read enough to know that I need to discharge the CRT.

I'd like to ask where you think I should start troubleshooting

#2 Tue, 6 Oct 2015 - 02:51

Do a search on capacitor replacement or repairs. There are people on here that will do if for a nominal fee like Uniserver. nothing can be checked until that is don't. Classics are to my knowledge one of the worst for bad caps.

#3 Tue, 6 Oct 2015 - 03:20

Thanks. I guess I'm looking for guidance on which capacitors to start replacing or should I start with cleaning the yoke connector plug.

#4 Tue, 6 Oct 2015 - 03:31

here is a great picture , from a thread on this forum, of the caps that are always completely shot to heck.

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in your situation, i am sure the caps are toast, but looks like there might be more bad in this instance.

but as everyones says change all the caps first.

#5 Tue, 6 Oct 2015 - 07:48

I agree, have spent most of a weekend repairing a pair of Classic :

First step is to clean the board, remove and replace capacitors.

Then the ones from the analog board:

here are the old leaky ones.

And you will probably end with a working unit: