Start with a complete system diagnostic -- F12 at powerup.  Record any errors by number (2000-0133, etc.).  
So, this happened yesterday. I just sat to switch on my dell vostro 15 just like a regular day and I noticed the display is suddenly distorted. There were several colored lines on the display and not just that, my laptop was not functioning well. It was so slow all of  sudden. Then I plugged in the charger because the battery was less than 10% and then suddenly after half an hour everything was fine. I also restarted it once in between. And then I left it to charge fully and now it is okay. Can anyone tell me if that is the same case with most of the Dell laptops? Should I do something about it or report it or what?[IMAGE]
Need help for distorted display