Dell Dimension 4500C Dell Dimension 4500C Owner's Manual - Page 60

www.jp.dell.com | support.jp.dell.com Diagnostic Lights To help you troubleshoot a problem, your computer is equipped with four lights on the back panel labeled "A," "B," "C," and "D" (see page 78). These lights can be yellow or green. When the computer starts normally, the lights flash. After the computer starts, the lights remain green. If the computer malfunctions, the color and sequence of the lights identify the problem. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions on page 9. Diagnostic Code YYGG ABCD GYGY ABCD Definition Corrective Action Memory modules are detected, but a memory failure has occurred. • If you have one memory module installed, reinstall it (see page 90), and then restart the computer. • If you have two or more memory modules installed, remove the modules, reinstall one module (see page 90), and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you identify a faulty module or reinstall all modules without error. • If available, install properly working memory of the same type into your computer (see page 90). • If the problem persists, contact Dell (see page 105). Memory modules are detected, but a memory configuration or compatibility error exists. • Be sure that there are no special memory module/memory connector placement requirements (see page 90). • Verify that the memory modules that you are installing are compatible with the computer (see page 97). • If the problem persists, contact Dell (see page 105). 60 Advanced Troubleshooting