I recently started experiencing problems with my Dell Inspiron 5100. It started by freezing and these lines about a quarter inch thick appeared vertically. The computer wouldn't allow me to anything but to shut it off by holding the power button. After that i tried to turn the computer but the startup screen never showed but the computer startup sounded regular. Also the screen stayed black throughout the start up and the caps lock icon flashed. After this the computer shuts down but it seems that the fans are still running for another sec or two. Also i took out the battery and hard drive to clean the dust off it, and the computer worked, but after an houtr it makes a sound like a CD skipping and the lines appear and I have to restart it manually again.
I surfed the web for an answer but i coudn't find anything, I would appreciate any help.