Troubleshooting 125• Bypass power strips, power extension cables, and other power protection devices toverify that the computer turns on properly.• Ensure that any power strips being used are plugged into an electrical outlet and areturned on.• Ensure that the electrical outlet is working by testing it with another device, such as alamp.• Ensure that the main power cable and front panel cable are securely connected to thesystem board (see "System Board Components" on page 150).IF T H E P O W E R L I G H T I S B L I N K I N G A M B E R — The computer is receiving electricalpower, but an internal power problem may exist.• Ensure that the voltage selection switch is set to match the AC power at your location(if applicable).Ensure that all components and cables are properly installed and securelyconnected to the system board (see "System Board Components" on page 150and "System Board Components" on page 212).IF T H E P O W E R L I G H T I S S T E A D Y A M B E R — A device may be malfunctioning orincorrectly installed.• Ensure that the processor power cable is securely connected to the system boardpower connector (POWER2) (see "System Board Components" on page 150).• Remove and then reinstall all memory modules (see "Memory" on page 155).• Remove and then reinstall any expansion cards, including graphics cards (see"Removing a PCI or PCI Express x16 Card" on page 163).EL I M I N A T E I N T E R F E R E N C E — Some possible causes of interference are:• Power, keyboard, and mouse extension cables• Too many devices connected to the same power strip• Multiple power strips connected to the same electrical outletPrinter ProblemsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.NOTE: If you need technical assistance for your printer, contact the printer’smanufacturer.CH E C K T H E P R I N T E R D O C U M E N T A T I O N — See the printer documentation for setupand troubleshooting information.
