I bought a refurbished emac, and I had it for about 4 months then things started happening..... I was using photoshop one day and the screen started getting dimmer and dimmer until it faded away to nothing, i.e. a blank screen as if it wasn't turned on. Now, every time I start the computer it gets as far as the apple logo then the screen goes completely blank. The odd occasion it starts up ok, but the screen goes dead after 10 mins or so. The last time it started up ok I managed to erase the HD and re-install os x, but the blank screen is still happening. It manages to start-up in safe mode ok without the screen going dead. What gives??? I would really appreciate some help here as my college work is suffering. Can anyone help me???