Dell E521 - Dimension Motherboard UW457 0UW457, Руководство пользователя

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Solving Problems
47
Power Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide .
C HECK YOUR NETWORK SETTINGS — Contact your network administrator or the person who set up
your network to verify that your network settings are correct and that the network is functioning.
R UN THE H ARDWARE T ROUBLESHOOTER — See "Resolving Software and Hardware Incompatibilities"
on page 59.
I F THE POWER LIGHT IS GREEN AND THE COMPUTER IS NOT RESPONDING — See "Diagnostic Lights"
on page 53.
I F 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.
I F 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. 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.
• Ensure that the main power cable and front panel cable are securely connected to the system board (see
"System Board Components" on page 69).
I F THE POWER LIGHT IS STEADY AMBER — A device might be malfunctioning or incorrectly installed.
• Ensure that the 12-volt power connector (12V) is securely connected to the system board (see "System
Board Components" on page 69).
• Remove and then reinstall the memory modules (see "Installing Memory" on page 72).
• Remove and then reinstall any cards (see "Cards" on page 74).
• Remove and then reinstall the graphics card, if applicable (see "PCI Express Cards" on page 80).