I think it's a rear Mobo issue. Used to happen before my Charging unit went out on my Toshiba lappy. Only thing, lappy would freeze after a while and nothin. Not even the mouse would move. Then it starts to restart when I did a fresh install of the OS, till it eventually stop charging and the only thing that I could see workin on the lappy was the orange led light on the power button, which was supposed to be green. Not even the charging indicator was working when I plugged in the charger.
LAPTOP:- Alienware M11x C2D @1.7GHz, SATA 300GB HDD, nVidia GT 335M 1GB (dis.), Intel GMA HD-64MB (int.), 2GB DDR3 RAM @1066MHz, 1.3MP webcam Running Windows7 64bit
MOBILE DEVICE:- SGS3 T999 dual core Qualcom Snapdragon @1.5GHz, 2GB RAM, 16GB (int. SD), Adreno 225 GPU, 8MP pri. cam, 1.9MP ff running Stock:4.0.4 UVLH2 modem