iPhone 3G not responding - blank screen
Had a bit of a problem with my iPhone 3G today. Having used it earlier in the morning to listen to music it was fine. However, when I went back to use it and wake it from sleep mode the screen would not show up. Instead, it just stayed blank.
The only way I could get it to light up was to plug in the charger, which allowed me to enter my passcode and use it as normal. Again however, when I put it to sleep and tried to wake it, I still only got the blank screen.
I have since plugged in the charger to wake it again and turned it off. Seems to be working okay now, but I'm a bit concerned it will happen again when I am not near my charger.
Has anyone had similar problems and worked out how to resolve them? I'm hoping its just a one-off glitch.
Thanks in advance.
iBook G4 12 768MB, Mac OS X (10.4.5)