I have found similar issues relating to a security update on other sites but have had no luck with any of the suggested work arounds. Also the issues are at least a year old and very specific to updates that were known to be bad.
Two days ago I received an error message that the display had failed and recovered and that everything was working fine. Then a few mins later the monitor screen went completely black.
After restarting my PC I noticed that I had vertical blue lines running through the display but everything was booting up like normal. Then the next screen which normally shows a list of devices and the boot devices as it goes through the verification process. This screen did not have the blue vertical lines but instead in the areas normally black it had every space filled with commas or other punctuation marks.
This did not phase the PC at that point because it continued like normal and went to the Windows logo splash screen, however the blue vertical lines were back.
Windows began to load up and then the screen flickered and went black again. I gave it a couple mins thinking that it may just be taking a bit. 20 mins later however still nothing. I then restarted again this time disconnecting the power cord from the PC after turning it off first. I know in the past that cutting the power after turning off the PC has been the trick.
10 mins without power and still not working. The interesting thing was that when I booted back up this time the blue vertical lines were gone as were the punctuation marks on the device list screen. But it still hung up at the loading windows logo screen with the screen going black.
I went to Nvidia's forums, other hardware and software forums, and even the Window's forums to see if a similar problem existed. Low and behold there were countless issues with similar problems all relating to software updates and compatability issues. Well I've been running Windows 7 since you could get it retail and none of the explained causes were applicable, but I decided to attempt the solutions given.
Well I've reset the BIOS by removing the battery. I've attempted to restart in Safe Mode with F8 (which I can't get to by the way). I've also attempted to boot with a disc in the CDROM, including the windows 7 install disk. I've checked to make sure that heat is not an issue and have even attempted to boot with the case off.
The one thing that keeps popping up and does not matter which I select is that I can either run a Start Up Recovery or Start Windows Normally. Both result in the same thing, a black screen shortly after the logo screen.
The card that I am using is a Nvidia 8600 xfx card and I have been using Windows 7 Pro 32 bit for the OS.