A1200 Motherboard Repairs (part 3)
Finally got chance to take a look at another couple of A1200 boards.
Firstly a version 1.D.4 that looked to be in good cosmetic condition. This board booted up and passed all my tests so far. No work needed. Happy days!
Next was an older 1.D.1 and it wasn’t in such good shape.
I hooked it up and couldn’t get it to boot. After hunting round the board I found it was missing a smd resistor (R591C) next to the CPU. It looked like it had been knocked off at some point. Replaced the resistor and it Boots!
That’s it for the easy part of this particular board. It was clear to see it was missing its IDE connector. I do seem to remember when I got this board (10 years) ago, that someone had soldered an IDE cable directly to the board, and I quickly removed it. After that it went to storage and I didn’t look at it again. The connector area was a mess, most of the caps in that area also look very bad. I can hardly believe it still works. C239 is even starting to split.
So I plan to replace ALL the Caps, and fully unsolder and clean the IDE area. Then replace with a new IDE header. I may have to repair some of the motherboard tracks that look heat damaged.