Need help with M 205 screen which will not stay in its designated position. It keeps switching between portrait and landscape mode. Any ideas would be very much appreciated!

I had a similar, but not exactly the same, problem with mine. It was related to NVidia's NView software (have you activated it).

The problem was that NView is not really designed to cope with screens that can rotate and in my case I had to disable it for when the tablet is not connected to an external monitor. There are a number of steps to follow to check/set this

To see if nView is enabled and causing problems, right click on the desktop and if you see NView Properties in the context menu that appears click it. The Nview properties window will spring into view. Simply uncheck the "enable nview" option at the top and away you go.

Hope that helps - that's all I can think it could be.

Problem continues-to persist. Disabled NView -with no impact on screen problem.
The problem seems to be with with a button on the top right side of the computer which is depressed by the rotating screen ... with the button depressed the screen orientation stays put but otherwise flips back and forth evertime pressure is applied to the screen (i.e everytime the button is toggled). Any other ideas?

thanks