Captains altimeter underreads on the ground and on climb out. The FO altimeter reads the correct aerodrome elevation with correct QNH set. However, the captains altimeter under reads and after takeoff can differ from the FO altimeter by several thousands of feet. Anyone knows how to fix this problem since the aircraft cannot be flown as the AP etc are working off the captains Altimeter. It has affected all FSX aircraft on file.

Disregard this post. Have sorted out the problem. Abit of research does go a long way!