If Only Part Of The Display Is Readable; Power Lights - Dell OptiPlex 330 User Manual

cable for the graphics card(s) is correctly attached to the card.
C H E C K T H E M O N I T O R S E T T I N G S
on adjusting the contrast and brightness, demagnetizing (degaussing) the monitor,
and running the monitor self-test.

If only part of the display is readable

C O N N E C T A N E X T E R N A L M O N I T O R
1 Shut down your computer and connect an external monitor to the
computer.
2 Turn on the computer and the monitor and adjust the monitor brightness
and contrast controls.
If the external monitor works, the computer display or video controller may be
defective. Contact Dell (see "Contacting Dell" on page 267).

Power Lights

CAUTION:
safety instructions in the Product Information Guide.
The power button light located on the front of the computer illuminates and
blinks or remains solid to indicate different states:
• If the power light is green and the computer is not responding, see
"Diagnostic Lights" on page 106
• If the power light is blinking green, the computer is in standby mode. Press
a key on the keyboard, move the mouse, or press the power button to
resume normal operation.
• If the power light is off, the computer is either turned off or is not
receiving power.
– Reseat the power cable into both the power connector on the back of
the computer and the electrical outlet.
– If the computer is plugged into a power strip, ensure that the power
strip is plugged into an electrical outlet and that the power strip is
turned on.
– Bypass power protection devices, power strips, and power extension
cables to verify that the computer turns on properly.
130
Troubleshooting
— See the monitor documentation for instructions
—
Before you begin any of the procedures in this section, follow the
.