Dell Precision 650 Setup and Quick Reference Guide - Page 38

www.dell.com | support.dell.com Light Pattern A B C D A B C D = yellow = green = off Problem Description A possible microprocessor failure has occurred. Suggestion Resolution Reinstall the microprocessor and restart the computer. Memory modules are detected, but a memory failure has occurred. 1 Reset the memory modules to ensure that your computer is successfully communicating with the memory. 2 Restart the computer. 3 If the problem still exists, remove all the memory modules and install one memory module in memory module connector 4. 4 Restart the computer. The following message appears: Alert! Operating in Debug Mode. Please Populate Memory in Pairs for Normal Operation. 5 Press to boot to the operating system. 6 Run the System Memory test group in the Dell Diagnostics. 7 If the memory module passes, shut down the computer, remove the memory module, and repeat the process with the remaining memory modules until a memory error occurs during start-up or diagnostic testing. If the first memory module tested is defective, repeat the process with the remaining modules to ensure that the remaining modules are not defective. 8 When the defective memory module is identified, contact Dell for a replacement. NOTE: If necessary, the computer can operate in debug mode until new memory modules are installed. 38 Setup and Quick Re ference Guide