Sony SDM-P232W Service Manual page 5

SELF DIAGNOSIS
This monitor is equipped with a self-diagnosis function. If there is
a problem with your monitor or computer(s), the screen will go
blank and the 1 (power) indicator will light up green. If the 1
(power) indicator is lit in orange, the computer is in power saving
mode. Try pressing any key on the keyboard or moving the
mouse.
If the picture disappears from the screen and the
1 (power) indicator is green
1 Turn off the 1 (power) switch and disconnect the
video signal cables from the monitor.
2 Turn the monitor on by pressing the 1 (power)
switch.
If all four color bars appear (white, red, green, blue), the monitor
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
If the color bars do not appear, there is a potential monitor failure.
Inform your authorized Sony dealer of the monitor's condition.
If the 1 (power) indicator lights up in orange
Try pressing any key on the keyboard or moving the
mouse.
The computer's power saving mode is shut off and the 1 (power)
indicator lights up in green, and the picture appears on the screen.
1 (power)
indicator
SDM-P232W(E) 5