Need some help from the electronics experts among you please:
I've designed a PCB for the FMC. According to the wiring diagram I've soldered on all the resistors and all the LED switches. I plugged in a 12v power power adapter which I think was 0.7 amps, and all the LED's were flashing, which according to online research, indicated the power supply wasn't enough.
I found another 12v power adapter which was 3 amps and after a couple of audible clicks, all the LED's went out. Turns out half of them have blown (palm on face moment). I removed the faulty LED's, tested the remaining ones work with a tester, replaced the faulty LED's with new ones (tested), but cant seem to get any of them to light up now when I plug in a 12v 1 amp adapter. Tested individually they all work, I have also tested the resistors are fine with a voltage meter.
Not sure what else to try. Any help is appreciated. Thanks!