Sorry my mistake that I didn't list the symptoms.
First of all, in the screen showed up lines that change when the screen changed. To understand what I mean, when I start the pc in screen the lines fill the screen. When the Windows logon is coming that lines are changed to another lines and etc. But when is getting in the desktop the lines dissapears. And the laptop works normally.
Second, the system didn't recognised the graphic card. The laptop works normal, without graphic drivers. I have Windows 7 and in System Updates again the graphic drivers didn't showed up. I tried to install the drivers normally but when I install it I have one problem. When I start the laptop blue screen is the first thing that I saw. In safe mode (that drivers didn't work) it works normally.
Finally, I want to tell you that the laptop works normally for internet use.
Thank you for answering in my post. I hope you answer again!
P.S. I hope that the screen works perfect! 