The problem is that I get no sound either from mix out or headphone connector. I am armed with multimeter, computer oscilloscope, cheap headphones and alligator clips. The headphone testing / http://www.ladyada.net/wiki/x0x/headphonetesting ) gave me correct measures except for U1, which was only 0.676 instead of 1V. I have no idea what else to test or what to do.
Please help me!