Dell Precision T3912 Quick Reference Manual

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32 Quick Reference Guidew w w . d e l l . c o m | s u p p o r t . d e l l . c o myellowyellowgreengreenMemory modules are detected, but amemory failure has occurred.1 Reseat the memory modules to ensurethat your computer is successfullycommunicating with the memory.2 Restart the computer.3 If the problem still exists, remove allthe memory modules and installone memory module inconnector DIMM_1.4 Restart the computer.The following message appears:Alert! Operating in DebugMode. Please PopulateMemory in Pairs forNormal Operation.5 Press to boot to theoperating system.6 Run the Dell Diagnostics(see page 26).7 If the memory module passes, shutdown the computer, remove thememory module, and then repeat theprocess with the remaining memorymodules until a memory error occursduring start-up or diagnostic testing.If the first memory module tested isdefective, repeat the process with theremaining modules to ensure that theremaining modules are not defective.8 When the defective memory moduleis identified, contact Dell fora replacement.NOTE: If necessary, the computer canoperate in debug mode until new memorymodules are installed.Light Pattern Problem Description Suggested Resolution= yellow= green= offA B C D