CQ-C8305U display problem !

check in device manager and see if you need to update the sound driver.

im thinking maybe a fuel filter sounds like it good luck

It sounds like a blown fuse. Are you checking them with a test light? And have you located all of the fuses. there will typically be a fuse box under the drivers dash area, and one under the hood. have another look Im certain you'll find a blown fuse. Good luck.

Replace the brake hoses, they deteriorate from the inside and clog up

You could go to your local auto zone to have them clear the code, but if it comes right back on it has a constant problem that will not go away until it is fixed.

Sounds like a wire not connected.

do you have an amp hooked up to your car stereo ?

Check the wiring to the dimmer switch. Sounds like there is no power at the switch, so get a wiring diagram and trace it back toward the battery. There is either a short or open in the circuit path.

You can order a new faceplate from Panasonic, if that is the problem. (You may find one on ebay, too?) Carefully check the connection before spending anything, as I wouldn't want to suggest spending on something that isn't broken. If you have electronic skills, check the internal connections from the jack to the internal board and every other connection. Also look for cracks in the board. If found, a light coat of solder can fix that up fairly well, and not cost anything.

Of course, this is all a guess, and I would verify everything yourself before doing anything. Good Luck.

Make sure you have good amount of room around the back of the unit. It sounds like you may have an overheating problem. If that isn't it, you have a bad ground or +.