I have installed a DWW-750FM in my car, had a few issues but its working now! Now for the new problem, there is no sound coming from the PC to the head unit. FM works from the head unit, and I can get sound from the PC on headphones. I do get a little alternator whine (grounding) and I have heard the music at times every so faintly.

I have checked:
Volume
Sound is good with headphones
Mixer is OK
not muted
HU is set to PC-Audio (AUDIO-3 for those with this head unit)
Swapped RCA cable

These HU's are a bit wierd, but Im fairly sure Im using it correctly.

HELP! Please...I want to see if its a HU issue and needs to be returned or its something else..

thanks in advance!

-b