IBM 4820, System Reference Manual

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Condition description Resolution
Blurred display data
v
Ensure that the video mode is set to 800 x
600.
v For models 46D, 46T, run the 4820 Video
Quality Test Pattern.
v Check if touchscreen or protective screen is
dirty.
v
Check the cable connections, and replace the
cables, if necessary.
v Replace the 4820 display, if necessary.
Noisy display
Run the 4820 Video Quality Test Pattern.
Unsteady, unfocused, or misaligned display
image
For Models 46x, 10D, 1FD:
1. Display a screen image with a bright
background.
2. Press the (+) and (-) buttons on the bottom
of the display simultaneously.
3. Activate the Auto-Adjust option by pressing
the (+) button.
4. If the display image is still unsatisfactory,
continue with these steps:
a. Display the menu again (repeat step 2
above) and select Manual Adjust by
pressing the (-) button and then the (+)
button.
b. Activate the Phase option by pressing
the (+) button and adjust the phase by
pressing the (+) button and (-) buttons.
Vertical bars appearing across top or bottom
half of display
v
Check that the LCD cable is securely
connected.
v Check that the controller cable of the host
system is securely connected.
v
Run the 4820 Video Quality Test Pattern.
v For Models 46x, 10D, 1FR:
1. Press the (+) and (-) buttons on the
bottom of the display simultaneously to
display a menu.
2. Select Manual Adjust
3. Select Horizontal and Vertical by
pressing the (-) button and then activate
your selection by pressing the (+) button.
4. Obtain the best image by pressing the (+)
and (-) buttons.
v If necessary, replace the cables.
v
Replace the 4820 display, if necessary.
Troubleshooting common problems
Appendix B. Troubleshooting common problems
B-3