Today, I started my car and got no sound out of my head unit
(Kenwood). The display lights up just fine, however. I have my sub
hooked up to a separate amp from my Polk separates, so I thought that
if one of the amps had gone bad, I'd still hear a signal from the
remaining good amp. However, there is no sound at all through the
speakers. The other day, I started the car, and had to wait for about
fifteen seconds longer than usual for the sound to come through the
speakers.

I don't have a lot of knowledge of car audio, but does this sound like
the head unit itself might have died?

If you need any more information, please let me know. Thanks in
advance!

Sardo Numspa