Dell Latitude E6400 XFR Service Manual

Also see for Latitude E6400 XFR: System Board Replacement How-to guide Service manual Setup and features information Installation instructions

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Dell Latitude E6400 XFR Service Manual Manual pdf 7 page image

Dell ™ Latitude™ E6400 XFR Service ManualPage 71 Troubleshooting1.1 Troubleshooting Tools1.1.1 Diagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow the safetyinstructions that shipped with your computer.Your computer has three keyboard status lights located above the keyboard. During normal operation, the keyboardstatus lights display the current status (on or off) of the Num Lock, Caps Lock, and Scroll Lock features. If thecomputer starts without error, the lights flash, and then turn off. If the computer malfunctions, however, you can usethe status of the lights to help identify the problem.NOTE: After the computer completes POST, the Num Lock light may remain on, depending onyour BIOS settings. For more information on using the system setup program, see the Dell™Technology Guide on your computer or at support.dell.com.Diagnostic Light Codes During POSTTo troubleshoot a problem with your computer, read the sequence of the keyboard status lights in order from left toright (Num Lock, Caps Lock, and then Scroll Lock). If the computer malfunctions, the individual lights display a statusof either On , Off , or Flashing .Light Pattern Problem Description Suggested ResolutionNo memory Modules aredetectedIf two or more memory modules are installed,remove the modules (see Removing a MemoryModule), then reinstall one module (see Replacing aMemory Module) and restart the computer. If thecomputer starts normally, continue to installadditional memory modules (one at a time) until youhave identified a faulty module or reinstalled allmodules without error.If available, install working memory of the sametype into your computer (see Memory).If the problem persists, contact Dell Support.Memory modules aredetected, but a memoryfailure has occurred.If two or more memory modules are installed,remove the modules (see Removing a MemoryModule), then reinstall one module (see Replacing aMemory Module) and restart the computer. If thecomputer starts normally continue to installadditional memory modules (one at a time) until youhave identified a faulty module or reinstalled allmodules without error.If available, install working memory of the sametype into your computer (see Memory).If the problem persists, contact Dell Support.Memory failed to initializeor memory is unsupported.If two or more memory modules are installed,remove the modules (see Removing a MemoryModule), then reinstall one module (see Replacing aMemory Module) and restart the computer. If thecomputer starts normally, continue to installadditional memory modules (one at a time) until youhave identified a faulty module or reinstalled allmodules without error.If available, install working memory of the sametype into your computer (see Memory).If the problem persists, contact Dell Support.