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I have fixed 3 x Commodore Amiga 4000 Motherboards and 2 x Commodore Amiga CPU Cards for a dear friend. Below the description and photo of each repair.

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Commodore Amiga 4000 Motherboard #1:

• I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers.
• Replaced some SMD electrolytic capacitors with a high ESR value.

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Commodore Amiga 4000 Motherboard #2:

• I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers.
• Replaced all SMD electrolytic capacitors with a high ESR value.

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Commodore Amiga 4000 Motherboard #3:

• I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers. I have also made a “bridge” because a track of the pcb was completely corroded.
• Replaced all SMD electrolytic capacitors with a high ESR value.

Still a couple of months with the battery acid and this Amiga was to throw in the trash.

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Commodore A3640:

• Replaced all SMD electrolytic capacitors with a high ESR value and a first acid leak.

Fixed the problem of the 3 capacitors installed with the wrong polarity. The silkscreen on the pcb are wrong. Thanks Commodore.

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Commodore A4CPU EC030:

• Replaced all SMD electrolytic capacitors with a high ESR value.