Dell OptiPlex 745c Quick Reference Guide - Page 26

Light Pattern Problem Description A possible graphics card failure has occurred. A possible floppy or hard drive failure has occurred. A possible USB failure has occurred. No memory modules are detected. Suggested Resolution • If the computer has a graphics card, remove the card, reinstall it, and then restart the computer. • If the problem still exists, install a graphics card that you know works and restart the computer. • If the problem persists or the computer has integrated graphics, contact Dell. For information on contacting Dell, see your online User's Guide. Reseat all power and data cables and restart the computer. Reinstall all USB devices, check cable connections, and then restart the computer. • If you have one memory module installed, reinstall it and restart the computer. For information on reinstalling memory modules, see your online User's Guide. • If you have two or more memory modules installed, remove the modules, reinstall one module, and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error. • If available, install properly working memory of the same type into your computer. • If the problem persists, contact Dell. For information on contacting Dell, see your online User's Guide. 26 Quick Reference Guide