Powers up to White screen, attempts to load twice, then shuts down?
After power up, it goes to White screen, displays rotating wheel and a status load bar... gets to 1/5th progress resets status load bar... again as far as 1/5th progress and shuts off! won't allow keyboard short cut commands pre white screen or on white screen... have followed online support suggestions re unplug power-mouse-peripherals etc.to no avail.
Any advice appreciated: