Hello, i have a medion md96691 with geforce 8600m gs (on board) , today my screen show a line in the center but with DVI in external screen its good !!! what is the problen? the inverter or Nvidia ? thanks
LCD screens don't fail unless there is an issue with power. When the do fail it is normally starting with dead pixels or regions of the screen going bad but with warning of slow decay that is noticeable to the user. You need to check and see if you have any warranty of the laptop and if not it isn't going to be cheap to repair. You can try to do it your self but being that you are hear I am doubtful that you have the skill to make the repair. Plus laptops are a pain in the ass when it comes to tech support. The gpu is fine if your image on an desktop monitor or tv is fine.
Remember laptops are a lot more difficult to fix than desktops and even TVs. I have done a little repair work on such things. Flat panels are easy while crt can be hazardous.