"It do be like that sometimes"
My guess is Bad IC chip, stray strand if wire touching something it shouldn't, internal trace with a dead end.... Your soldering looks pretty decent.. especially since you did a reflow and theres more solder than usual at a joint... I've seen noobs in here with...
Yeah... I'm impressed you don't have a computer.. I'm currently scanning our man cave downstairs where myself and my 3 teens all have our own rediculously overbuilt computers with watercooling. It would have cheaper for me to just give them calculators...
I bought a set of alphabet rubber stamps that are 1/4" letters and use testors enamel model paints for labeling occasionally... I also bought a set of metal stamping dies from harbor freight that has letters and numbers for stampings... on those I smear in enamel into the stamping and wipe real...
Wondering if you installed the correct parts for your voltage regulators... Snap some pics that are clear so we can see your resistor bands and all the things..
Nice job!... Here's a little tip for that middle potentiometer so do don't blemish your caps... We see your mistakes.. lol
make sure you clip the leads fairly flush where the pot goes... clean the back of your pcb with 99% iso.... then place that middle pot in the pcb and solder it in from the...
It's probably the same hole size for the electrovibe faceplate as well..... I use basically the same as jcpst suggested but the 5mm version... you have to open up the faceplate hole slightly for the 5mm version.... i just do it with a drill bit by hand with my oversized/undersized drill bit set..
Start a new thread in the troubleshooting section.... First thing you need to do is get some 99% isopropyl and clean your board... All that flux is pretty bad. Your soldering definitely needs some more dialing in and likely the culprit.. but also your transistor selection/ pinout could also be...