TMM4500 Reference Guide
T
ROUBLESHOOTING THE
TMM4500
(
CONTINUED
)
Problem
Possible Causes and Solutions
“Video Mode Not Supported”
message
Check the maximum resolution and the frequency on the video port of
your computer. Compare these values with the data in the Display
Modes Timing Chart.
Image is too dark or too light
Adjust the display’s Brightness and Contrast
Horizontal bars appear to flicker,
jitter or shimmer on the image
Adjust the Fine function
Vertical bars appear to flicker, jitter
or shimmer on the image
Adjust the Coarse function and then adjust the Fine function
Image is not stable and may appear
to vibrate
Check that the display resolution and frequency from your PC or video
board is an available mode for your display screen. On your computer
check: Control Panel -- Display Settings, if the setting is not correct,
use your computer utility program to change the display settings.
Horizontal Frequency: 30kHz ~ 61kHz
Vertical Frequency: 50kHz ~ 75kHz
Maximum Refresh Rate: 1280 x 1024 @ 75Hz
Image is not centered on a display
screen
Adjust the screen’s horizontal and vertical positions
Display screen video cable not
connected
If power is applied to the unit without the video cable connection
between a display screen and the computer, one of the following on-
screen messages will be displayed:
“
No Signal Going to Sleep
” or “
No Signal
”
The OSD adjustment buttons are inactive for the unconnected display
screen. This message will appear for 10 seconds before turning off. If
the video cable is connected to the computer, this information is not
displayed.
Video Signal Out of Specification
If the video sync signals do not
meet the monitor specifications, the
unit will display the following
screen:
Out of Range
– or –
Invalid Mode FH: 93.6 KHz
FV: 74.9 Hz
The message will detail the current horizontal and vertical scan
frequencies, which the LCD panel does not support. This message will
appear for 15 seconds before turning off.
Trenton Systems, Inc.
6-2
