General Category > Lisa Troubleshooting and Repair

How to reach the CPU card for testing?

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sigma7:

--- Quote from: fri0701 on December 27, 2023, 10:36:46 pm ---Does anyone have a trick to make this easier?

--- End quote ---
I haven't used this technique, but I speculate it will work for some circumstances:

Without the I/O Board installed, the PSU will (usually) turn on when power is connected, and the CPU board will run through the initial part of the ROM's diagnostics until the point where it finds there is no I/O Board.

So, depending on what kind of problem you are troubleshooting, you may be able to figure it out by probing the back of the CPU Board with no I/O Board installed.

HTH

AlexTheCat123:
Yep, now that the fault has been fixed, warmech's risers work great! So if I were you, I'd put a couple of those together. They really make working on your CPU board an absolute breeze!

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