The system isn't putting out any sound but the panel lights up...???

 

can you give us some history?
Is this a new problem? What caused it? etc

 

The only thing i could think of is maybe the wires are not hooked up with the speakers...

 

I have the same problem. Some people say it's the mini amps in the doors but thats not it. I think the problem is the main amp in the trunk is fried. HU sends signal to the main amp, main amp relays the signal to the front and so on.. Only logical thing I can think of so I am going to test out the main amp to see if it's fried then buy a used one if it is.

Check your fuses though (mine are fine so that's not my problem).

 

I have checked all the fuses and connections with a voltage meter. Everything is OK. The head unit seemed to be working due to the display changing with the different function buttons and dials. Until the other day. I took it to an audio shop and the tech pulled the head unit out. He told me that it had been out before because there was a screw missing from the sideof the HU. He re-installed it as it was and now the display does not come on except if I push on the lower left of the front of the HU. Is that screw a grounding screw? Could that be keeping the sound from working? HELP? Should I replace the BOSE Amp or HU first?

 

The main amp is your problem.