Dell XPS 720 Black Owner's Manual - Page 66
Diagnostic Lights, see Front View on When the computer starts normally
View all Dell XPS 720 Black manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 66 highlights
Diagnostic Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front panel (see "Front View" on page 13). When the computer starts normally, the lights flash before turning off. If the computer malfunctions, the sequence of the lights help to identify the problem. NOTE: After the computer completes POST, all four lights turn off before booting to the operating system. Light Pattern Problem Description Suggested Resolution The computer is in a normal off condition or a possible pre-BIOS failure has occurred. The diagnostic lights are not lit after the system successfully boots to the operating system. • Plug the computer into a working electrical outlet (see "Power Problems" on page 61). • If the problem persists, contact Dell (see "Contacting Dell" on page 179). A possible processor failure has occurred. • Reseat the processor (see "Processor" on page 129). • If the problem persists, contact Dell (see "Contacting Dell" on page 179). Memory modules are detected, but a memory failure has occurred. • If two or more memory modules are installed, remove the modules (see "Removing Memory" on page 93), then reinstall one module (see "Installing Memory" on page 92) and restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error. • If available, install working memory of the same type into your computer (see "Installing Memory" on page 92). • If the problem persists, contact Dell (see "Contacting Dell" on page 179). A possible graphics card failure has occurred. • Reseat any installed graphics cards (see "Cards" on page 94). • If available, install a working graphics card into your computer. • If the problem persists, contact Dell (see "Contacting Dell" on page 179). 66 Troubleshooting