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Compaq P1210 User Manual Page 22

Compaq user's guide color monitor p710, p910, p1210.
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Thin vertical black lines on one or both sides of the screen.
This minor condition is caused by grille element overlap
which can occur during shipping.
Position an open white window over the affected area of
the screen and maximize the brightness and contrast
Black vertical
controls. This will cause localized heating of the overlap
lines are visible
which will clear in a few minutes. Be sure to readjust the
on the screen.
brightness and contrast controls back to the normal
viewing levels after this procedure.
Two fine horizontal
lines are visible on
the screen.
Shadow of Damper Wires
A buzzing sound
when power on.
The 2 very faint thin lines across the screen are normal.
They are caused by the aperture grille stabilization
filaments(Damper Wires) which are required for all
aperture grille CRTs'.
A brief vibration or hum sound that is heard just after power
up is normal. This is caused by the automatic degaussing
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.
Aperture Grille
Electron Gun
Damper Wires
Aperture Grille Type
Shadow of
Damper Wires


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