Dell Technology Guide
Page 275
... SYSTEM HAVE FAILED AT CHECKPOINT [NNNN]. 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). Possible HDD failure... R D - C M O S C H E C K S U M E R R O R - Diagnostic Lights for the topic on the Dell Support website support.dell.com. System Messages for Desktop Computers NOTE: If the message you can use the status of the lights to learn more about the meaning of certain features. Replace the CPU fan (see the Service Manual for your computer...
... SYSTEM HAVE FAILED AT CHECKPOINT [NNNN]. 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). Possible HDD failure... R D - C M O S C H E C K S U M E R R O R - Diagnostic Lights for the topic on the Dell Support website support.dell.com. System Messages for Desktop Computers NOTE: If the message you can use the status of the lights to learn more about the meaning of certain features. Replace the CPU fan (see the Service Manual for your computer...
Setup Guide
Page 31
... three consecutive times for the same error (see "Contacting Dell" on page 43 for assistance). Possible motherboard failure or RTC battery low. CPU fan has failed. Possible hard disk drive failure during HDD boot test (see "Contacting Dell" on page 43 for assistance). Hard-disk drive read ... the Service Manual on page 43 for assistance. NOTE: If the message you could see "Contacting Dell" on the Dell Support website at checkpoint [nnnn]. Replace keyboard or check the cable for assistance). The computer failed to resolve the issue. CPU fan failure - Possible hard disk...
... three consecutive times for the same error (see "Contacting Dell" on page 43 for assistance). Possible motherboard failure or RTC battery low. CPU fan has failed. Possible hard disk drive failure during HDD boot test (see "Contacting Dell" on page 43 for assistance). Hard-disk drive read ... the Service Manual on page 43 for assistance. NOTE: If the message you could see "Contacting Dell" on the Dell Support website at checkpoint [nnnn]. Replace keyboard or check the cable for assistance). The computer failed to resolve the issue. CPU fan failure - Possible hard disk...