So, something's up with my 3GS for a week or so now. The screen sometimes has a full, screen-wide yellow tint to it, very noticeable. It looks very much like what a video signal on a TV would like if, say, one of three RGB cables was removed, leaving the whole image lacking a third of the palette or something, and the result is a washed-out, yellowed image.
It happens intermittently when I press any button to wake the display up. I'd say, 60% of the time, I get the washed-out display, and the other 40%, it's perfectly normal.
Yesterday, Genius at the Apple Store suggested a cable might be loose on the inside. He cracked it open in the back, said he reconnected everything firmly, and then the problem seemed to stop happening for a few hours. Tonight, it's started again, and the rate is higher than 60% occurrence for sure.
To be clear, when I wake the display up and it's tinted like I described, it stays that way until the display is turned off. Then when woken again, it's like I hop on the roulette again and chance whether it'll be tinted or not.
Very frustrating! Any suggestions?