Troubleshooting; Symptoms - ViewSonic VPW4200 User Manual

TROUBLESHOOTING

Symptoms

If the point to check does not correct the symptoms, please contact your local Service center for assistance.
WARNING
Self servicing can be hazardous.
Symptom
There is no picture and the power-indicating lamp
is off.
The message "No cable connected" or "Going to
sleep" is displayed.
There is no picture and the power indicating lamp
lights orange.
The message "Invalid Scan Freq." is displayed.
The power indicating lamp is lit normally but there
is no picture.
The display image appears slanted.
Text displayed across the screen appears
vertically streaked, with the characters in vertical
columns blurred.
Text displayed across the screen appears
blurred.
A fine pattern flickers when displayed on the
screen.
The remote control does not work.
Check to see that the power cable is properly connected.
Press the main switch.
No sync signal is detected.
Check that the signal cable is properly connected.
! No Sync. Signal
Make sure that the computer, imaging equipment, etc., is turned
on.
Make sure the computer is not in power-save mode.
Ensure that the input selection matches the connection terminal.
An input signal is received abnormally.
Ensure that the input signal matches the monitor specifications.
! Invalid Scan Freq.
Check to see that the signal cable is properly connected.
Check the contrast and brightness settings (adjust them for
higher contrast and brightness).
Check to see that the signal cable is properly connected.
Adjust the clock frequency and the phase. (Adjust the clock
frequency first, the dot clock phase next.)
(RGB input)
Adjust the clock phase till the desired clarity is obtained.
(RGB input)
Ensure that the batteries in the remote control are inserted with
the correct polarity.
Check to see that the batteries in the remote control are
functional.
Point to check
ViewSonic VPW4200/4210
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