HP ProBook 655 G1 Notebook PC - Manual (Page 102)

A movie is not visible on an external display
1. If both the computer display and an external display are turned on, press fn + f4 one or more
times to switch between the 2 displays.
2. Configure the monitor settings to make the external display primary:
a. From the Windows desktop, right-click on a blank area of the computer desktop, and select
Screen resolution.
b. Specify a primary display and a secondary display.
NOTE: When using both displays, the DVD image will not appear on any display designated as
the secondary display.
92 Appendix B Troubleshooting