HP Pavilion tx2635 tablet pc display issue

I have a HP Pavilion tx2635 tablet pc, on which i had installed Windows Vista. It had around 300 GB hard drive along with 3gb ram. Recently, i noticed that when i flip my screen on my HP Pavilion tx2635 tablet pc the display doesn't adjust. Can any one tell me that why i'm having display issue on my HP Pavilion tx2635 tablet pc? Is there any kind of drivers been missing on my HP Pavilion tx2635 tablet pc? Any one knows about it? Kindly provide me the correct solution for the above issue. Any help on the above issue would be appreciated.

According to me, you should try to reinstall the Device Driver on your HP Pavilion tx2635 tablet pc. This is normal for all notebook lcd's and many desktop flat panel lcd's with the exception of the high end models which do a very good job of reducing distortion when stretching images smaller than the native resolution.

If you can't see anything at all unless an external is hooked up, then it could be the motherboard, inverter, or lcd panel problem. Try updating the graphics card by installing a latest clean graphics driver by going to the official Hp website and then download the latest drivers on your system.

Restoring your system won't have any effect on it since you've indicated an external monitor worked fine with it. In my personal opinion HP should fix this problem no matter whether the product is under warranty or not because it is manufacturing defect.