Iphone stuck on landscape mode after changing housing
 

After succesfully changing the entire housing on a 3gs, the customer has come back as the accelerometer is not working, and the phone only works on landscape. I upgraded the phone to 4.3.3 also.

I notice now on the old housing there are small two pieces of metal 'pegs'. One just under the camera and one lower left, that perhaps were not in the new housing. So the question would be, Is this part of the accelerometor function, as I have no idea how it works?

I can see from the motherboard diagram the accelerometor is under the soldered in part of the board, so not sure how this would have got damaged?

If anyway has any knowledge of this please advise thanks!