So about three weeks ago my PC (which is fairly old but still in working older and is also home made) began having issues on startup. It started normally, but after getting to the home screen (Windows 7 operating system) the screen went blank. I currently have it hooked up to my TV rather than a monitor and so I just got the 'no signal' default TV screen. Since then every few days it will have the same issue, or the screen will freeze, or the PC itself will start up with lights on and the fan running but there will be no display. This even happens if I tried to start it up in safe mode. My fiancé knows a bit about computers and has suggested a few options (graphics card, temperature issue or something wrong with the hard drive) but either nothing he does helps or he isn't sure how to fix the problem. Also, on startup, the disk usage is almost always 100%. I cannot include the technical specifications of the computer because of these issues as I am currently using my fiancé's computer.