I've just complete my Amp 10, and have trouble starting it up.
the board passed the 5V test, so I completed the board and hooked it up.
After connecting the amp, the LED doesn't come on.
I've tried in both polarities, but nothing.
I do see a voltage change across the LED between muted and unmuted positions.
I tried connecting a cheap speakers to the amp, and found two strange things:
1. One channel has a DC offset and is making noise.
2. The other channel enters into protection when the speaker is connceted.