I've never had any serious PC issues like this before, but I'll try and explain everything that happened and hopefully someone can offer me some advice. I was playing WoW and a load of wavy green lines appeared on the screen. The video froze, but the sound was still playing normally, so WoW itself can't have locked up. I restarted and the Windows XP loading screen had some glitchy, white lines on it. Once it got to where the login screen would usually be, the monitor lost signal and went on standby. I checked that all my fans were still running, and I managed to get into the setup screen and it looks like my temperatures are fine. On the next restart, I got to the screen that told me Windows was unable to start properly due to suddenly shutting down the last time and it gave the option to start in safe mode. Well, I wasn't able to move the cursor, and random letters in each word were flashing. Eventually it started itself and the same thing happened: the monitor lost signal at the login screen. Is this an issue with my graphics card, or something else? It seems really odd that I can see some things and not others, but all the graphical glitches do lead me to believe it's a video problem. If it's not that, are there any surefire ways of telling which component gave up and conked out? Any help with this will be massively appreciated, as I'm now worried that I'm gonna have to find the cash for a brand new PC.