Removing the system board............................................................................................................... 21Installing the system board.................................................................................................................223 System Setup....................................................................................................... 23System Setup overview....................................................................................................................... 23Boot Sequence.................................................................................................................................... 23Navigation keys................................................................................................................................... 23Updating the BIOS ..............................................................................................................................24System Setup options......................................................................................................................... 254 Troubleshooting................................................................................................. 27Enhanced Pre-Boot System Assessment (ePSA) diagnostics............................................................ 27LED error codes...................................................................................................................................27Battery status lights............................................................................................................................. 285 Specifications...................................................................................................... 296 Contacting Dell...................................................................................................34Contacting Dell................................................................................................................................... 344