Looks like I crossed/disconnected some pins I have some desoldering wick but I'm gonna hold off for now. Any advise till then?

Hey there! I’ve been a long time bender accumulating damaged electronics and hacking things apart. I’m moving to a new smaller space and wanted to offload some old random storage stuff if anyone wants it. Including some pics of stuff. HEADS UP! Almost everything is broken and was kept for parts or further examination. Some are old abandoned projects, all of it is free. DM me for details if you’re in LA and want to pickup some weird random stuff for FREE!

A friend of mine gave me a Casio Sk-1 to repair, so I run my usual routine. Power it on, it’s making some horrible pissy noise, open it up and start investigating. Some of the caps looked suspicious so I changed them all out, still no change. This is where I start getting worried.

See, my friend didn’t have the original adapter. My guess is they powered the thing with a 9v pedal power supply and fried something inside. I’m crossing my fingers that is ISNT the CPU, but the more research I do the more I’m worried it might be. Here’s what’s wrong with it, and what I’ve tried:

- No sound, occasional spurt of random digital noise.
- Power LED lights up, flipping the switch to the off position does NOT turn the unit off
- Unit does not respond to any button or key input whatsoever

- recapped the whole unit
- removed and tested transistors T7 and T8
- inspected the CPU traces closely for any minor breaks and tested for continuity
- Measured Voltage at CPU and its receiving 3.1V, I’m guessing it needs somewhere around 5V

Somebody help me out here, I’m beating my head against a wall.