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Check jumpers of any motherboard mounted card to be sure a jumper has not been lost or loose.If you have been inside your system,its always a possibility to have moved card.
MONITOR WORKS BUT POOR DISPLAY
If your monitor works but images appear fuzzy,or flickering often,and text are hard to read,it may be time to adjust video card's resolution and refresh rate.
Right click desktop,select properties and open display properties dialog box.Choose tab for settings and adjust slider to change your display resolution.Most 17-inch monitors will have a resolution of 800 x 600 but choose best resolution for your eyes.
After adjusting resolution,check display to see if all flickering and other problems have vanished. If not,optimize refresh rate.The refresh rate is rate in which video card redraws screen.Lower refresh rates sometimes cause flickering.
To adjust this rate,open display properties dialog box in desktop, and choose settings tab once again.Click advanced button and choose adapter tab if your operating system is Windows 98.
If you have Windows XP,choose Monitor tab.And from there you can set refresh rate to about 70Hz or 70 Hertz.Check your monitor's manual or web site to see maximum refresh rate for your monitor.
To effectively maintain your video display,visit supporting web sites for updated software patches and device drivers.Watch for new control software for your card that will greatly boost its performance.
Take time to clean system unit case which will allow air to flow freely.This in turn will help keep video components cool which will allow card perform smoothly.
Rush over to www.ultimatepcrepair.com/photos.html and study video components.Then open your PC ,locate video card,and know if it is motherboard mounted or not.To learn much more in great detail, get PC Super Pack with detailed video all about video display system.
Otis F. Cooper is solely dedicated to boosting the knowledge and confidence of every computer user that is serious about knowing computers.Use his informative articles and videos to understand every aspect about the PC. Read more about his formula for pc training at http://www.ultimatepcrepair.com