Welcome ,I will give a full and clear answer to your question, please make sure to reply to any questions I have. They may be essential to my reply.
Hi , the flashing ? mean the Mac cant see the boot OSX installation or its not selected.
Do you have your Mac OSX install DVD ?
first off lets try a safe boot .
A safe boot can help fix any Mac HD errors,Turn off the Mac .Power on the Mac .Hold shift on the keyboard using a "USB keyboard or for laptops use the built in keyboard , while powering on the Mac just after the chime and starting up keep holding the Shift key , this should boot to safe mode.Once booted to safe mode , restart and boot as normal .Full details here :-http://support.apple.com/kb/ht1455
if nothing changes , we will need to make a few checks via disk utility , while booted to the Mac OSX install DVD .
repair the Macintosh HD , and then repair permissions.
What OSX version is installed , and was the Mac upgraded to this version or shipped with?
Leopard , snow leopard , lion ,etc . ?
hi thanks for this i run snow leopard (latest version), it was shipped with snow leopard computer bought in nov 2008, of course i don't get the chime as start up doesn't get that far just white screen then flashing file etc.
ok at 4th attempt safe boot has worked - how do i stop this problem re-occuring though? still concerned computer could crash at any moment!! as i said, it tends to work fine, then get slower and slower, then suddenly (using activity monitor) safari web content spikes to 100%. and then everything collapses. thisall started when i went so icloud - still can' sync iphone etc.
ok have tried to launch itunes, no response. tried to launch google chrome, no response. in activity monitor shows both applications in red, and as not responding. have to force quit, sbbod appears, though mail now works!! Aaaaargh!!!
now has frozen completely (finder not responding) running so hot i can hardly touch computer
i do have the snow leopard install dvd