Dell Inspiron 535ST Dell™ Technology Guide - Page 275
Diagnostic Lights for Laptop Computers, System Messages for Desktop Computers
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FOR MORE INFORMATION: To learn more about the meaning of the various diagnostic lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. Diagnostic Lights for Laptop Computers Typically laptop computers have keyboard status lights located above the keyboard. See the documentation shipped with your computer for more details. During normal operation, the keyboard status lights display the current status of certain features. If the computer malfunctions, you can use the status of the lights to help identify the problem. FOR MORE INFORMATION: to learn more about the meaning of the various keyboard status lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. System Messages for Desktop Computers NOTE: If the message you received is not listed in the table, see the documentation for either the operating system or the program that was running when the message appeared. ALERT! PREVIOUS ATTEMPTS AT BOOTING THIS SYSTEM HAVE FAILED AT CHECKPOINT [NNNN]. FOR HELP IN RESOLVING THIS PROBLEM, PLEASE NOTE THIS C H E C K P O I N T A N D C O N T A C T D E L L TE C H N I C A L S U P P O R T - The computer failed to complete the boot routine three consecutive times for the same error (see "Contacting Dell" on page 337 for assistance). C M O S C H E C K S U M E R R O R - Possible motherboard failure or RTC battery low. Replace the battery (see the documentation shipped with your computer or see "Contacting Dell" on page 337 for assistance). C P U F A N F A I L U R E - CPU fan failure. Replace the CPU fan (see the Service Manual for your computer). H A R D - D I S K R E A D F A I L U R E - Possible HDD failure during HDD boot test (see "Contacting Dell" on page 337 for assistance). Troubleshooting 275