Dell Technology Guide
Page 275
Possible motherboard failure or RTC battery low. During normal operation, the keyboard status lights display the current status of certain features. If the computer malfunctions, you received ... the meaning of the various keyboard status lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. Replace the CPU fan (see the Service Manual for your computer for more details. D I S K R E A D F A I L U R E - See the documentation shipped with your computer or see "Contacting...
Possible motherboard failure or RTC battery low. During normal operation, the keyboard status lights display the current status of certain features. If the computer malfunctions, you received ... the meaning of the various keyboard status lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. Replace the CPU fan (see the Service Manual for your computer for more details. D I S K R E A D F A I L U R E - See the documentation shipped with your computer or see "Contacting...