Dell Precision T3400 User's Guide - Page 102

Light Pattern Problem Description Suggested Resolution A possible USB failure • Reinstall all USB devices, check cable has occurred. connections, and then restart the computer. • If the problem persists, contact Dell (see "Contacting Dell" on page 269). No memory modules are detected. • If two or more memory modules are installed, remove the modules (see "Removing a Memory Module" on page 160), then reinstall one module (see "Installing a Memory Module" on page 160) 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 "Memory" on page 157). • If the problem persists, contact Dell (see "Contacting Dell" on page 269). System board failure Contact Dell (see "Contacting Dell" on has occurred. page 269). Memory modules are detected, but a memory configuration or compatibility error exists. • Ensure that no special requirements for memory module/connector placement exist (see "Memory" on page 157). • Ensure that the memory you are using is supported by your computer (see "Memory" on page 33). • If the problem persists, contact Dell (see "Contacting Dell" on page 269). A possible system board resource and/or hardware failure has occurred. • Perform the procedures in "Restoring Your Operating System" on page 136. • If the problem persists, contact Dell (see "Contacting Dell" on page 269). 102 Troubleshooting Tools