Re: Apple Lisa 2/5 I/O Board COPS Error

Comput_85 thank you for your comment, and previous ones also. I'm having a hard time figuring out how to actually check for voltage. I have a simple multimeter. Do you use both the red and black lead? Sorry for my ignorance. I'm still learning.

On Thursday, November 30, 2017 at 4:35:55 PM UTC-8, austj..._at_email.domain.hidden wrote:
>
> 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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