Dell Technology Guide
Page 275
... C H E C K S U M E R R O R - Replace the battery (see the documentation shipped with your computer for more details. CPU fan failure. Replace the CPU fan (see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). Possible HDD failure during HDD boot... failed to help identify the problem. C P U F A N F A I L U R E - Troubleshooting 275 H A R D - Possible motherboard failure or RTC battery low. Diagnostic Lights for Laptop Computers Typically laptop computers have keyboard status lights located above the keyboard. FOR MORE INFORMATION: To...
... C H E C K S U M E R R O R - Replace the battery (see the documentation shipped with your computer for more details. CPU fan failure. Replace the CPU fan (see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). Possible HDD failure during HDD boot... failed to help identify the problem. C P U F A N F A I L U R E - Troubleshooting 275 H A R D - Possible motherboard failure or RTC battery low. Diagnostic Lights for Laptop Computers Typically laptop computers have keyboard status lights located above the keyboard. FOR MORE INFORMATION: To...