Dell Technology Guide
Page 275
... Lights for Laptop Computers Typically laptop computers have keyboard status lights located above the keyboard. Possible motherboard failure or RTC battery low. Replace the CPU fan (see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). The computer failed to help identify the problem. C P U F A N F A I L U R E - D I S K R E A D F A I L U R E - If the computer...
... Lights for Laptop Computers Typically laptop computers have keyboard status lights located above the keyboard. Possible motherboard failure or RTC battery low. Replace the CPU fan (see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). The computer failed to help identify the problem. C P U F A N F A I L U R E - D I S K R E A D F A I L U R E - If the computer...