Dell Technology Guide
Page 275
... Manual for your computer or search for the topic on the Dell Support website support.dell.com. The computer failed to help identify the problem. C M O S C H E C K S U M E R R O R - CPU fan failure. Possible HDD failure during HDD boot test (see "Contacting Dell" on page 337 for assistance). Replace the CPU fan (see the documentation for assistance). Troubleshooting 275 System Messages...
... Manual for your computer or search for the topic on the Dell Support website support.dell.com. The computer failed to help identify the problem. C M O S C H E C K S U M E R R O R - CPU fan failure. Possible HDD failure during HDD boot test (see "Contacting Dell" on page 337 for assistance). Replace the CPU fan (see the documentation for assistance). Troubleshooting 275 System Messages...
Setup Guide
Page 41
... cable is correct (see the Service Manual at support.dell.com). No timer tick interrupt - Possible system board failure or RTC battery low. In case of keyboard failure, replace the keyboard. For assistance, see Dell Technology Guide on your computer or at support.dell.com. Replace the CPU fan. Hard-disk (HDD) drive failure - Keyboard failure...
... cable is correct (see the Service Manual at support.dell.com). No timer tick interrupt - Possible system board failure or RTC battery low. In case of keyboard failure, replace the keyboard. For assistance, see Dell Technology Guide on your computer or at support.dell.com. Replace the CPU fan. Hard-disk (HDD) drive failure - Keyboard failure...