Video output suddenly blacks out - no error messages just a black screen. Windows reports no errors, everything seems OK just no video output so no option but to hard reset PC. Problem only happens in first 20-30 minutes after powering on. Once machine been running a while it doesn't seem to happen. Assumed it was a PSI problem so upgraded to a new PSU but problem persists.
System details below. Any help gratefully received as I'm out of ideas!
Sapphire AMD Radeon HD 6770
AMD Catalyst Driver Version, and Driver History
12.10 recently updted from 12.8
Windows 7 64 bit, SP1
Motherboard or System Make & Model
System Dell XPS 420
Motherboard Dell 0TP406, Intel X38 Chipset
Corsair GS600 - 600W
Display Device(s) and Connection(s) Used
CMC 17" monitor connected via RGB and DVI-RGB converter
Native resolution 1280x1024
Applications and Games
Problem occuring in Windows but more common in games e.g. Skyrim, Diablo etc.... doesn't seem to occur once system been running for 20-30 minutes.
Intel core 2 Quad Q6600, not overclocked
Motherboard BIOS Version
Dell BIOS A04, date 27 Mar 2008
System Memory Type & Amount
4 GB DDR2
Booting from SSD 2 x other HDD installed, TV Tuner, wireless card etc...