The video card or port is probably "overstressed" and it blinks/blanks out" for a moment then recovers with the small default display. Check to see if any video fan is present and working. The overall case temp. can cause the video to reach a limit and it flakes out. The problem can only get worse or later failure. Either cool the case better and/or check that the fan cooling is 100%. If this is OK, then your video card/port is starting to fail, replace. You can be sure to update its drivers to the latest, but I feel the h/w side is at fault. However, be sure that video cable is fully seated. The other half is that the monitor is starting to flake out due to the same reasons. If this is a LCD monitor, then prolonged viewing in high res. setting just becomes too much and it flakes out. If you set to simpler display, does the display last longer using reg. screen? I lean towards the video card/port being the problem.
I got a Dell Computer that is 2 years old. I have been using it for everyday works in the internet, like watching movies or listening to radios. I also work with animation using that but I am having problem with the computer for a couple of months.
First, when I watch movies or videos and if i am watching it in full screen, the screen becomes black and then from full screen, it becomes regular screen. When I had 2 or three programs running and one of them is movies or any kind of audio, the minimized windows gets maximized and the computer makes a CLICK sound from inside, not from the sound box. I have noticed that it happens after 20-30 minutes. But only if the mouse is being untouched. for example when I am surfing in the internet, the computer blackness doesn't happen. But if I am watching a movies, then the blackness happens.
Today when I was watching a video from Youtube in full screen, between 20-30 minutes the screen went black and then the full screen became minimized to the regular Youtube screen and then the page refreshed by itself, starting the video from the beginning. It can't be virus, I think because I have Spyware Doctor and Norton Antivirus checking the system everyday. I think that the blackness have to do something with the clicking sound.
More Information About My Computer
System: Microsoft Windos XP Home Edition
Service Pack 2
Dell Dimension Dimension 3000
2.79 GHz, 512 RAM
If anyone has the same kind, please reply in this topic.