Sounds like a battery problem.
You didn't say, so I have to ask.
Have you charged the battery?
Charge for 4 hours according to Sony.
So, I bought this camera 2 yrs ago and I didn't have any problems till now! So, once I turned on the camera and suddenly the camera asked me to enter the date and time, I entered it and I after pressing OK, the camera froze! There is no way to pass this date and time entering since it appears each time when I turn on the camera. I tried everything: from reseting, to initializing...I managed to initialize the camera by plugging it with usb to computer. After unplugging it from the computer, the camera works normally, and there aren't any problems but once I turn the camera on without having it plugged to a pc, the date and time window appears and the camera freezes once again after pressing OK.
I suspect this is a software problem but I honestly don't know how to solve it. Any ideas? Is there any way to reinstall the firmware?