sorry, i don't think it works with my laptop,  i tried to delete my video driver, and installed it again, but it still have the same problem

Hi XinZzz,

Thanks for providing us this information. Kindly remove the drivers from the system and install it from the link below:

http://bit.ly/15dSby

If you have any further queries, please feel free to contact us.

Thanks and Regards
Sandeep P
#iworkfordell

its AMD Radeon HD 6900M series on Windows 7 Home premium

not the same actually, it is said AMD Catalyst Mobility cannot be downloaded due to incompatible hardware/software on your computer, the version of your graphics adapter is not supported.

and i finished the diagnostic, it said did not identify any hardware faults.

Hi XinZzz,

I appreciate the time and effort that you took to troubleshoot the issue. Do you receive the same error message while trying to install the above driver?

Kindly try to install the video driver in safe mode. Also, run the diagnostics on the system from the link below:

http://dell.to/NI55sF

If you have any further queries, please feel free to contact us.

Thanks and Regards
Sandeep P
#iworkfordell

and i start think whether it is the driver's problem or it is the screen's problem? how can i get a replacement for my screen?

Hi XinZzz,

I appreciate the time and effort that you took to troubleshoot the issue. It seems to be an issues with graphic driver or the card.

It would be better if you check the system with an external monitor to isolate the cause of the issue.

If you have any further queries, please feel free to contact us.

Thanks and Regards
Sandeep P
#iworkfordell

thanks for the suggestions, it much better after i tried tons of times, but still there are some green dots on my laptop sometimes, and there's one more problem, my laptop always overheat, so i was wondering if you can give my laptop a full hardware scan? i'll appreciate it

Hi XinZzz,

I appreciate the time and effort that you took to troubleshoot the issue. Please check the link below for running diagnostics on the system:

http://dell.to/13X4Rq2

If the system is under warranty then please contact me through a private message by clicking on my name highlighted in blue. On the next page, click the envelope icon and provide your service tag and contact information so I may access your system records.

And, if the system is out of warranty then you contact our Expired Warranty Support at the link below:

http://dell.to/12LmNBq

If you have any further queries please feel free to contact us.

Thanks and Regards
Sandeep P
#iworkfordell