Brightness panel on computer monitor stuck to 100

buddy200

Honorable
Nov 22, 2012
4
0
10,510
It happened this morning, suddenly brightness panel on my computer monitor has stuck to 100 and is not going anywhere. I am using Samsung syncmaster 933n. I pressed other buttons too, tried auto adjust, lowered brighness but it comes back to 100 and stays there.

here is the image:
UAMcq.jpg