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Yes, lets have some more information & a close up picture.
What monitor is it from?
what does it say on it?
Is there a legend/reference on the PCB for it?
Try & trace the circuit to see what other components it connects to - can you reproduce that area so we can help figure it out?
EDIT: Googling has shown it to be the PCB from a Viewsonic VP930B which has no indication of automatic sense of rotation (not something I would expect to find on a PC monitor) so I would not expect the device to be a tilt switch.
As far as I'm aware of, it's a usual feature of many wide screens that can be rotated at the stand.
A tilt switch can be easily identified with an ohmmeter, or possibly by shaking the board.
P.S.: The state-of-the-art automatic rotation feature possibly isn't mentioned in a short specification. The operators manual
usually tells, that the device can be switched to portrait mode by simply rotating the display (after installing a respective
FvM has got to be right. When I move the board, you can hear something moving around inside it. I know the monitor is able to determine it's orientation. I thought the moving thing inside it was an indication that it was broken, but the orientation sensor answer is RIGHT ON!