Dell OptiPlex 760 - Manual (Page 175)

Power Problems
If the power light is blue and the computer is not responding — See Diagnostic Lights .
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.
l Reseat the power cable in the power connector on the back of the computer and the electrical outlet.
l Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly.
l Ensure that any power strips being used are plugged into an electrical outlet and are turned on.
l Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
l Ensure that the main power cable and front panel cable are securely connected to the system board (see the "System Board Components" section for
your computer).
If the power light is blinking amber — The computer is receiving electrical power, but an internal power problem may exist.
l Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
l Ensure that all components and cables are properly installed and securely connected to the system board (see the "System Board Components"
section for your computer).
If the power light is steady amber — A device may be malfunctioning or incorrectly installed.
l Ensure that the processor power cable is securely connected to the system board power connector (POWER2) (see "System Board Components"
section of the Service Manual for your computer).
l Remove and then reinstall all memory modules (see Memory ).
l Remove and then reinstall any expansion cards, including graphics cards (see the "Removing PCI and PCI Express Cards" section for your computer).
Eliminate interference — Some possible causes of interference are:
l Power, keyboard, and mouse extension cables
l Too many devices connected to the same power strip
l Multiple power strips connected to the same electrical outlet
Printer Problems
Check the printer documentation — See the printer documentation for setup and troubleshooting information.
Ensure that the printer is turned on
Check the printer cable connections —
l See the printer documentation for cable connection information.
l Ensure that the printer cables are securely connected to the printer and the computer.
Test the electrical outlet — Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Verify that the printer is recognized by Windows —
Windows XP:
1. Click Start® Control Panel® Printers and Other Hardware® View installed printers or fax printers.
2. If the printer is listed, right-click the printer icon.
3. Click Properties® Ports. For a parallel printer, ensure that the Print to the following port(s): setting is LPT1 (Printer Port). For a USB printer, ensure
that the Print to the following port(s): setting is USB.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
NOTE: If you need technical assistance for your printer, contact the printer's manufacturer.