MEGA BUMP...
Different person, same issue. My 06 SE upon startup starts beeping and ejecting each CD in the headunit. While this is going on, the HU basically has no function. The display has nothing (usually, yesterday it had about 6 solid blocks starting from right to left across the screen). No buttons function, trying to cycle power does nothing. Whatever input it was last on when I turned it off functions (for example, I left with iPod in AUX, so this played, and volume control worked). Eventually, after maybe 10 minutes functionality and screen returns to normal. I'd say this has happened maybe 4 or 5 times now. I feel that it occurs when it is hot outside (Texas, 95ish degrees) and after the car cools down is when it begins to function.
Anyways, is this a known issue? Anyone else ever come across this problem? Any ideas for a remedy?
P.S. its a 6 disc changer, no JBL badging though, so I don't know about that.