I am using my Book 13 for about a year now. Today, when I close the lid by to less than 90 degrees, the screen just went off and black. But the screen works fine over 90 degrees.

Then I check the screen carefully when it is closed to less than 90 degrees, I can still see the images on my screen but like without any backlighting.

I am wondering if anyone has encountered the same problem as well? I should just send it back for repair?