Dell Technology Guide
Page 275
... more about the meaning of the various diagnostic lights displayed, see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). Possible motherboard failure or RTC battery low. Replace the CPU fan (see the documentation for assistance). H A R D - During normal operation, the keyboard status lights display the current status...
... more about the meaning of the various diagnostic lights displayed, see the Service Manual for your computer or see "Contacting Dell" on page 337 for assistance). Possible motherboard failure or RTC battery low. Replace the CPU fan (see the documentation for assistance). H A R D - During normal operation, the keyboard status lights display the current status...