MacBook cutting out during start up
my 4 year old MBP qont turn on
when I start it up the apple logo comes on and then under that is a loading bar
as of the computer is doing an update
it gets to about 1/3 through the loading bar then cuts out even when connected to power
ive tried the resetting the PRAM
but still wont turn on
any help appreciated!!
xxx
MacBook Pro (13-inch Early 2011)