So I did have a working Peggy2 hanging from one my wire racks in the office. Recently we discovered the optional switch pack laying on the floor so I dusted off the board to retrofit the optional switches and noticed that our notorious pee cat had targeted part of the board. The TI chips and the power jack were the only things with visible corrosion so I cleaned up the pins and sockets. Right now the thing is a paper weight. No communication with the COM port. No visible actions on either Battery or AC power. Voltage normal out of the power supply.

So two questions:

1) I assume that there is nothing I could do soldering in the optional switches that would cause the malfunction.

2) Are there any quick voltage measurements, etc. to begin diagnosing the issue?

I have one older socketed Ardunio but not sure if I can just pop the Peggy chip into it to see if its bad(?)

Oh one last question: anybody want to adopt a psycho cat?

1) I assume that there is nothing I could do soldering in the optional switches that would cause the malfunction.

No, probably not.

2) Are there any quick voltage measurements, etc. to begin diagnosing the issue?

The *ahem* affected areas are the most likely to be affected, so pop out the TI chips and check for accidental continuity between any of those pins there.

Then, check to make sure that you can actually apply power okay-- check that you have (for example) 5 V at pin 1 of the AVR.

I have one older socketed Ardunio but not sure if I can just pop the Peggy chip into it to see if its bad(?)

Yes, you can do that-- for ATmega168 or '328 chips from Arduino models up to and including Duemilanove; the Uno chips are not fully compatible.

After much probing and popping ICs in and out of sockets Peggy decided to come alive again. Looks like I probably should replace the 24 pin sockets because they look pretty bad inside. Maybe the power switch which I suspect has internal residue;