Could you help solving this?
Two nights ago I was gaming as usual, then a few minutes after exiting the game, my screen suddenly got random noise-coloured horizontal lines on it and all the screen elements were kinda half-misplaced horizontally (as if every 2nd pixel line was shifted), and after a minute or so it all went white. I think one of my fans might have been emitting some unusual noise when the error first occurred, but that might have been the usual increased activity due to gaming.
When I quickly restarted my computer, the blue Win7 loading screen already showed the stripes, and after it showed that fade-to-black animation when it loads the actual Windows UI, it all just stayed black instead, and I had to turn it off with the power button after a few minutes. I let it "cool off" overnight, then tried again, with the same result.
Every time I tried since, the very first screen with the motherboard (I think) logo shows some black dots that I don't think were there before, then the DOS-like loading screens and the black Windows loading screen with the animated logo appear all right, but the blue loading screen shows the lines, then fades to blackness (or once to a solid light blue colour), and stays that way, while according to the noises my system loads in the background as normal, until I hard reset. But when I start my computer in Safe Mode, it all works properly, I can use my PC on a smaller resolution.
Only thing I can think of that I did recently is that a few weeks ago I cleaned my computer case out with compressed air, but I didn't move the GPU at all then, and have been gaming as usual since then.
Following some other tips I found on the internet, I tried to run or reinstall Catalyst Control Center in Safe Mode, but it says it can't detect any existing driver or GPU, and closes itself. At the same time Windows's Device Manager and the AIDA64 sees the GPU's correct model.
My PC is only useable in safe mode at the moment, and I can't magick an internet access on it under safe mode, so I'm stuck with trying to run fixes via a USB stick. I didn't yet dare to disable or uninstall the existing GPU driver in case my PC wouldn't even work in safe mode then.
(PS: I had this PC config since 2011, and it was working all right until now.)
OS: Win 7 Pro S1 x64
CPU: Intel Core i5-2500
Motherboard: Gigabyte GA-PH67A-UD3-B3
GPU: AMD Radeon HD 6870
Screen: Samsung SyncMaster T200
Edited by corellon, 29 May 2016 - 06:44 AM.