ViewSonic ViewPanel VG150 User Manual page 14

Troubleshooting
No power
Make sure power button (or switch) is ON.
Make sure A/C power cord is securely connected to the back of the
ViewPanel® and to a power outlet.
Plug another electrical device (like a radio) into the power outlet to verify
that the outlet is supplying proper voltage.
Power on but no screen image
Make sure the video cable supplied with the ViewPanel is tightly secured
to the video output port on the back of the computer. If the other end of
the video cable is not attached permanently to the ViewPanel, tightly
secure it to the ViewPanel. The ViewPanel comes with a 15 pin mini D-sub
signal cable.
Adjust brightness and contrast.
Check this user's guide to see if an adapter is required for proper signal
continuity between the graphics card and ViewPanel.
Horizontal lines "streak" across the screen
Set the refresh rate (vertical frequency) to 60 Hz. See your graphic card's
use guide for instructions.
Wrong or abnormal colors
If any colors (red, green, or blue) are missing, check the video cable to
make sure it is securely connected. Loose or broken pins in the cable
connector could cause an improper connection.
Connect the ViewPanel to another computer.
If you have an older graphics card, contact ViewSonic® for a non-DDC
adapter. (See the back of this guide).
Entire screen image scrolls (rolls) vertically
Make sure video input signals are within the ViewPanel's specified
frequency range.
Try the ViewPanel with another power source, graphics card, or computer
system.
Connect the video cable securely.
Control buttons do not work
Press only one button at a time.
ViewSonic VG150/VG150B ViewPaneP Other Information