68kMLA Classic Interface
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| Classic II | |
| Posted by: Patrickool93 on 2009-07-11 22:56:22 I picked up a Classic II yesterday for $3 at a church rummage sale. Today I finally got the chance to power it on and check it out. Unfortunately I was greeted with this:  No bong no resone from the KB/Mouse, and nothing but a cramped blank screen.So I opened it up and saw some capacitor goo, expected, and some corrosion. I cleaned up some of it with some alcohol and a q-tip. I tried it again, but to no avail. Here's a picture of the worst corrosion.  So I remembered a spare Classic I board, and tried it in place of the II board. It turned on to this:  Partial success!I'll make a post in the compact forums, but does these symptoms ring a bell to anyone? | |
| Posted by: joshc on 2009-07-11 23:33:55 Needs a proper restoration. Replace all caps on logicboard and analog board if you know what you are doing. Otherwise, let a professional do the recap for you. Also, read this: http://68kmla.org/files/classicmac2.pdf | |
| Posted by: Unknown_K on 2009-07-12 01:08:44 I just recapped my Classic II, a bit of a pain because everything is cramped but doable. You need 3 different values, maybe 13 total aluminium capacitors going from memory. | |
| Posted by: Scott Baret on 2009-07-12 06:48:08 Does anyone on here re-cap Classic analog boards? I've got several that could use it. | |
| Posted by: Mars478 on 2009-07-12 07:35:14 Just whatever you do, dont do what I did. xx( :'( | |
| Posted by: Patrickool93 on 2009-07-12 12:05:03 Well, after a through cleaning/drying to see if I can get it to boot temporarily it still does the same. I'm thinking even if I replace the capacitors that it will still be dead because of the corrosion on some chips. So... anyone have a spare Classic II logic board? | |
| Posted by: Unknown_K on 2009-07-12 12:32:55 The only dead motherboard I cannot revive (so far) by replacing capacitors is one from an 840av that has some gook under important chips. I can't tell from your picture how much corrosion there is, is it greenish? | |
| Posted by: Patrickool93 on 2009-07-12 12:57:34 I dark green on the pins of a few chips behind the serial ports, as well as blue/green on the chip directly next to the internal floppy port. Actually, I just looked at it, many random chips appear to have the corrosion. None on the on board RAM though. | |
| Posted by: Unknown_K on 2009-07-12 13:04:08 Get an old toothbrush and some soap and see if they scrub off. | |
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