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A3ronoob

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  1. Hello Recently I got a macintosh classic that have the checkerboard screen issue. When I opened the machine, I saw a huge corrosion mark under the analog board. I thought it would be some leaking capacitors like many macintosh of this model have, I was ready to recap boards. But it's not. Actually no capacitors have leaked, it's the PRAM battery that opened up completely (litteraly). The analog board seems to be fine but the mainboard has been corroded so much that the battery holder has desoldered. I've tried to clean up some of the corrosion with isopropyl alcohol but there's still a lot of this brown heap. I'm now looking for help on how bring that board back to normal running; like get rid of the corrosion and maybe rewire some pcb tracks and put an PRAM equivalent battery. The machine powers up fine to the checkerboard screen, I tested it before opened it. Here's pictures of the disaster: The leak corroded the chassis. Where the leak occured, the battery holder was where the corrosion heap is. It affected some of chips legs and resistors on the other side. The dead battery. The top is slightly open. The battery and its holder. The holder is completly ruined and was desoldered by the corrosion. Hoping that you can get me some help
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