Apple Lisa 2/5 I/O Board COPS Error

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From: <austjeremy_at_email.domain.hidden>
Date: Thu, 30 Nov 2017 16:35:55 -0800 (PST)

My Apple Lisa 2/5 I/O board gives me a COPS chip error. I tested the chip in another I/O board it works just fine. I switched out the socket. I checked for continuity on each pin in the new socket. I have checked every single tracing that connects to every pin of the COPS socket, all test fine.

The computer starts just fine with another I/O board.

Symptoms, the computer powers on the second power is turned on. I don't have to push the power button. It just double beeps and gives I/O board error 52.

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Received on 2017-12-01 10:50:45