L550S
15" TFT LCD Color Monitor
6. Troubleshooting
14/17
Problem
Blank screen
Error message:
Video mode not
supported
The display does
not enter power
management
mode
Possible solution
If the power LED is not lit, push the Soft power switch or check the
AC cord to turn the monitor on. If the display unit is powered
through the computer, check that the computer is switched on.
The display unit might be in standby mode. Push one of the
keyboard keys. Check that the keyboard is properly connected to
the computer.
Check that the signal cable connector is properly connected and that
the connection pins are not bent or damaged. If the connector is
loose, tighten the connector's screws.
Check that the power cable is correctly connected to the display unit
and to the power outlet.
Check the resolution and the frequency on the video port of your
computer.
Compare these values with the data in the Preset Timing Table.
The video signal from the computer does not comply with VESA
DPMS standard. Either the computer or the graphics adapter is not
using the VESA DPMS power management function.
If your monitor is not functioning properly, you may be able to solve the problem
by reading followings.
