Rockwell Automation 6157 Industrial 20 inch Monitors - Manual (Page 24)

24 Industrial 20" CRT Monitor
Publication 6157-5.1
Symptom Possible Problem Action
Display is present and stable, but missing
some color(s) Video cable problem. Check for proper video cable installation.
If using BNC inputs, test monitor as follows.
Disconnect signal cable(s) corresponding to the
missing color(s). Disconnect signal cable
corresponding to a displayed color and connect it
to the input(s) corresponding to the missing
color(s). If a missing color reappears, the signal
cable corresponding to that color is faulty;
otherwise, the monitor is faulty.
Replace suspected faulty cable.
Fault in monitor. Have monitor serviced.
Display is present and stable, but colors
are not pure Monitor requires degaussing. Manually degauss the monitor. Refer to
Page 17.
Enclosure requires degaussing. Manually degauss the enclosure. Refer to
Page 17.
Display is present, but “jitters” or is
severely distorted
NOTE: Do not confuse the flicker
associated with an interlaced video mode
with jitter.
Interfering external AC or DC
magnetic shield If possible, reposition the monitor beyond the
proximity of large transformers, motors, bus bars,
etc.
Ask Rockwell Automation about various shielding
options available to protect the monitor.
Display is present, but “bars” appear
across it. “Noise” generated by other
equipment in the environment is
present at the video inputs Consult the application note which discusses
method’s of eliminating noise.
Connected monitor to computer. When
powered, the PC locked up (For units
using the HD-15 only) Graphics card driver is not
compatible with monitor Update the graphics card drivers to the latest
version.