Compaq P1220 User Manual page 16

PROBLEM
Thin vertical black lines on one or both sides of the
Black vertical
screen. This minor condition is caused by grille element
lines are visible
on the screen. overlap which can occur during shipping.
Position an open white window over the affected area of
the screen and maximize the brightness and contrast
controls. This will cause localized heating of the overlap
which will clear in a few minutes. Be sure to readjust the
brightness and contrast controls back to the normal
viewing levels after this procedure.
The 2 very faint thin lines across the screen are normal.
•
Two fine horizontal
They are caused by the aperture grille stabilization
lines are visible on
filaments(Damper Wires) which are required for all
the screen.
aperture grille CRTs'.
• A brief vibration or hum sound that is heard just after power
A buzzing sound
up is normal. This is caused by the automatic degaussing
when power on.
function. This sound will be heard each time the monitor is
powered up from a cold start and each time the manual
degauss button is used.
This monitor has
Check the color bar. (e.g RED, GREEN, BLUE)
•
"SELF DIAGNO-
CHECK the H, V signal input.
•
SIS" to check the
Push the > button, the picture size is expanded to a large
•
operating condi-
size.
tions of the moni-
tor.
Check power-on indicator on the bezel.
•
If the signal cable
If this indicator is blinking (Orange--> Black--> Orange),
is disconnected or
there is a possibility of failer.
abnormal signal is
Please call your Authorized Product Support.
received, the fol-
lowing message
will appear.
ITEMS TO CHECK LOCATION