[meeera]

Can you post a photo of the screen? What temperature did it get down/up to overnight, was your car outside or undercover? What do you mean by "opened it" - opened the case, or simply tried to start the device? Do the LED lights change when you plug it in (ignoring what's happening on the screen)?

(I'm guessing this one's dead, but you should try the usual full charge, reset protocol. Warranty service would not apply when the device is misused anyway, and leaving it in a car overnight is misuse.) [eta - whoa, I just looked up your weather and it's pretty stinking hot there at the moment!]