Dell Technology Guide
Page 275
...lights display the current status of the various diagnostic lights displayed, see "Contacting Dell" on the Dell Support website support.dell.com. PREVIOUS ATTEMPTS AT BOOTING THIS SYSTEM HAVE FAILED AT CHECKPOINT [NNNN]. Replace the battery (see the documentation shipped with your computer or see the Service Manual... the operating system or the program that was running when the message appeared. Possible motherboard failure or RTC battery low. Possible HDD failure during HDD boot test (see "Contacting Dell" on page 337 for more about the meaning of the lights to complete the ...
...lights display the current status of the various diagnostic lights displayed, see "Contacting Dell" on the Dell Support website support.dell.com. PREVIOUS ATTEMPTS AT BOOTING THIS SYSTEM HAVE FAILED AT CHECKPOINT [NNNN]. Replace the battery (see the documentation shipped with your computer or see the Service Manual... the operating system or the program that was running when the message appeared. Possible motherboard failure or RTC battery low. Possible HDD failure during HDD boot test (see "Contacting Dell" on page 337 for more about the meaning of the lights to complete the ...