Contents 7Replacing the Processor . . . . . . . . . . . . . . . . 10012 Power Supply . . . . . . . . . . . . . . . . . . . . 103Mini Tower Computer Power Supply . . . . . . . . . . 103Removing the Power Supply From the Mini Tower Computer 103Replacing the Power Supply in the Mini Tower Computer 104Power Connectors in the Mini Tower Computer . . 106Desktop Computer Power Supply . . . . . . . . . . . . 110Removing the Power Supply From the Desktop Computer 110Replacing the Power Supply in the Desktop Computer 111Power Connectors in the Desktop Computer . . . 11213 BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Flashing the BIOS From a CD . . . . . . . . . . . . . . 117Flashing the BIOS From the Hard Drive . . . . . . . . . 11814 System Board . . . . . . . . . . . . . . . . . . . . 119Removing the System Board . . . . . . . . . . . . . . . 119Replacing the System Board . . . . . . . . . . . . . . . 12015 Troubleshooting . . . . . . . . . . . . . . . . . . . 123Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Power Lights . . . . . . . . . . . . . . . . . . . . 123Beep Codes . . . . . . . . . . . . . . . . . . . . . 124Diagnostic Lights . . . . . . . . . . . . . . . . . . 126Diagnostic Light Codes During POST. . . . . . . . 127
