Hi guys
I am new to bending and the whole world of electronics in general and trying out a few SA-1s, following some of the great diagrams and tips here. Haven't had much luck yet, and just wanted to see if there were any general tips on how to diagnose problems. I appear to have killed one and the other two were bought 'untested and as seen'. I can get a few notes out of one before it, almost literally, coughs, chokes and dies. I can keep doing this by turning it off and on again, though it won't do it every time, but I can't get it to play more than a few notes. I haven't added any mods except add a line-out jack and battery pack. It doesn't look that great inside, and the battery coil is rusty.
Also, after the keys stop working, I can get various low hums and crackles by touching screwdrivers on the chip pins corresponding to glitch and other bends seen in the diagrams, so it's clearly still live and responsive in some way, but not providing any of the wonderful madness I got from the same glitch connections on the other one before it stopped working, so I don't know what the problem is with this one.
As I said, I'm trying to learn how everything works from scratch, so any suggestions for trouble shooting, much appreciated.
Cheers