My Dell Studio XPS 1645 came with ATI HD4670 graphics & windows 7 Pro 64bit. Last year I updated to windows 8 & eventually to 8.1. After upgrading to win 8. There was only beta driver available for the graphics card. Its was working fine, very rarely the video driver crashes & return to normal. But last week While I was using my system it got crashed with bluescreen error - VIDEO_TDR_FAILURE ...atimkag.sys.. error. After that, my laptop display not working, not even bios screen/dell logo @ startup. just blank.
So when I connected to external monitor through VGA port. I was able to see the screen with lots of strange lines & colors, dots, etc.. ( random). & @ the welcome screen it crashes again showing the same error.
Once when I connected via HDMI port, the laptop display became white. & thats it.
Also when i ran motherboard diagnostics, during the video card test- it showd color lines & asked me it is visible. - Yes it is visible but accompanied with random dots, lines,etc..
So what caused this problem & what is the solution ???????
Is there any problem with the motherboard ? Will replacing the motherboard solve the problem ??
Please help me. I'm in deep trouble.