HP t420 Troubleshooting Guide - Page 5

Table of contents 1 Product features ...1 Hardware features ...1 Front panel components ...2 Rear panel components ...3 Removing the rubber feet ...4 Serial number location ...4 2 Hardware changes ...5 Warnings and cautions ...5 Removing and replacing the access panel ...6 Removing the access panel ...6 Replacing the access panel ...7 Locating internal components ...8 Removing and replacing the USB 3.0 flash drive 9 Removing the USB 3.0 flash drive ...9 Replacing the USB 3.0 flash drive ...10 Removing and replacing the battery ...11 Appendix A Computer Setup (F10) Utility, BIOS Settings 13 Computer Setup (F10) Utilities ...13 Using Computer Setup (F10) Utilities 13 Computer Setup-File ...15 Computer Setup-Storage ...16 Computer Setup-Security ...17 Computer Setup-Power ...18 Computer Setup-Advanced ...19 Changing BIOS Settings from the HP BIOS Configure Utility (HPBCU 20 Appendix B Diagnostics and Troubleshooting 22 LEDs ...22 Wake-on LAN ...22 Power-On Sequence ...23 Resetting the Setup and power-on Passwords 23 Power-On Diagnostic Tests ...24 Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 24 POST Numeric Codes and Text Messages ...26 v