Due to the limitation of the ATI Mobility-M1 and Mobility Radeon video chip, motion pictures can only be displayed on display devices that is set to Primary.
Follow the steps below to set the display device to Primary:
1. Right-click an empty area on the desktop and click Properties.
2. Click the Settings tab and click Advanced.
3. Click the Display tab.
4. Click the green button located on the upper-left hand of the display which is to be set as a Primary display device.
5. Click OK.