Screen resolution problems (by 4 users)

I can not set the screen resolution of my samsung syncmaster T220HD to 1680 x 1050. This resolution is not offered with the screen properties although I connected previously already succesfully a 1680 x 1050 monitor to the same pc.

I have the same exact problem. This computer was not in use for a while but the monitor was used on 2 other computers with no problems, then I recently reinstalled to OS on the Dell 4600 and the resolution WILL NOT change at all, there are not even any options to adjust it or update the drivers or anything. Its actually set to 800 x 600 but it has nothing has changed!

Monitor won't adjust to match input resolution (1280x1024). Auto adjust feature doesn't make a difference