Dell OptiPlex 330 Quick Reference Manual page 52

– 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. Also, bypass power protection devices, power strips, and
power extension cables to verify that the computer turns on properly.
– Ensure that the electrical outlet is working by testing it with another
device, such as a lamp.
• If the power light is steady green and the computer is not responding:
– Ensure that the display is connected and powered on.
– If the display is connected and powered on, see "Beep Codes" on
page 53.
• 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 green and the computer is
not responding:
– Ensure the display is connected and powered on.
– If the display is connected and powered on, see "Beep Codes" on
page 53.
• If the power light is steady amber, the computer is receiving electrical
power, but a device might be malfunctioning or incorrectly installed.
– Remove and then reinstall the memory modules.
– Remove and then reinstall any cards.
– Remove and then reinstall the graphics card, if applicable.
• If the power light is blinking amber, there may be a power problem or an
internal device malfunction.
– Ensure that all power cables are securely connected to the system
board (see "System Board Components" on page 36).
– Ensure that the main power cable and front panel cable are securely
connected to the system board (see "System Board Components" on
page 36).
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Quick Reference Guide