Flashing folder start up...another one
I have tried all the suggestions below but interestingly resetting PRAM makes no difference, and holding the option key doesnt bring up disc options just leaves a white screen with a cursor.
This has happened twice now about 4 weeks apart and on both occaisions I have gone to bed frustrated with it only to find that next morning the option key works , I select the disc and everything is fine.I have since run the disc utiity check and runs fine.
When its failing I have left off for 30 mins or so but it still fails - it needs a night sleep !!! Is this a heating problem or somewhere I read there is an internal battery that can need replacement, or is it just the hard disc starting to fail ???
Its an Imac 24 Early 2008 and I have recently upgraded to Maverick but I dont think thats relavent.
Any thoughts ???
iMac (24-inch Early 2008), OS X Mavericks (10.9.2)