Dell Technology Guide
Page 275
... of the lights to complete the boot routine three consecutive times for the same error (see "Contacting Dell" on page 337 for assistance). Replace the CPU fan (see the Service Manual for Laptop Computers Typically laptop computers have keyboard status lights located..."Contacting Dell" on page 337 for assistance). D I S K R E A D F A I L U R E - FOR MORE INFORMATION: To learn more about the meaning of the various diagnostic lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. Possible motherboard failure ...
... of the lights to complete the boot routine three consecutive times for the same error (see "Contacting Dell" on page 337 for assistance). Replace the CPU fan (see the Service Manual for Laptop Computers Typically laptop computers have keyboard status lights located..."Contacting Dell" on page 337 for assistance). D I S K R E A D F A I L U R E - FOR MORE INFORMATION: To learn more about the meaning of the various diagnostic lights displayed, see the Service Manual for your computer or search for the topic on the Dell Support website support.dell.com. Possible motherboard failure ...