Re: Bad I/O Board error 52 problem

>I've done some further testing tonight and it looks like I can pull
>OUT the COP421 and still get the same error. I guess it's back to
>retesting traces.

That was my guess too.

Also, the touch-ups with the conductive pen might not have a low enough resistance.

There are genuine Apple schematics on the net that are accurate (as far as I know/recall).

Good luck!

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