i re-soldered re-cleaned and did manage to get it working. so i decide to give it one more clean and when i reconnected it now windows simply does not detect the dac, no sound to indicate a usb device.   3v3 next to pcm2707 is less than 0.5v and the +2.5v is less than 0.5v.   so what...

i have soldered up my dac but it is  not getting recognized. all the voltage is fine except the 4.5v is 4.7v.   any assistance?