So I just finished building my crack amplifier. All the resistance checks and voltages checked out. I got it fired up and it was working great, for about 20 minutes. Then out of no where, the amplifier shut off and I haven't been able to get it to turn back on. Everything seems ok when I look under the hood. I am very new to this, and this was my first DIY project. Any help on where even to start would be appreciated! Thanks.
Mark