Dell Technology Guide
Page 275
...H A R D - Possible motherboard failure or RTC battery low. During normal operation, the keyboard status lights display the current status of certain features. ALERT! Replace the CPU fan (see the ... E L L TE C H N I L U R E - Troubleshooting 275 FOR MORE INFORMATION: to help identify the problem. C P U F A N F A I L U R E - C M O S C H E C K S U M E R R O R - See the documentation shipped with your computer or see "Contacting Dell" on page 337 for assistance). System Messages for Desktop Computers NOTE: If the message you can use the status of the lights to learn more...
...H A R D - Possible motherboard failure or RTC battery low. During normal operation, the keyboard status lights display the current status of certain features. ALERT! Replace the CPU fan (see the ... E L L TE C H N I L U R E - Troubleshooting 275 FOR MORE INFORMATION: to help identify the problem. C P U F A N F A I L U R E - C M O S C H E C K S U M E R R O R - See the documentation shipped with your computer or see "Contacting Dell" on page 337 for assistance). System Messages for Desktop Computers NOTE: If the message you can use the status of the lights to learn more...