logging on/restarting p.c.

[honky113]

Hi there

For the past couple of days when I am restarting my P.C., it boots into the Windows screen then goes blank after that and nothing else happens. I thought it might have had something to do with software so I formatted the p.c. but it still keeps doing it. Operating system is Winx64 bit, graphics card is 7800gtx, motherboard is A8N-SLI series - anyone know what the problem might be?

cheers
honky 113

 

[honky113]

I think the problem is that when I have got just a single hard drive in with windows on it, it boots fine but when I add my 500gb it just boots and hangs there on the boot up screen - its blank.
I can plug in my hard drive when the operating system is on



honky113

ps
still the same in safe mode
and it is all sata drives