Installing the system board.........................................................................................................186Trusted Platform Module..................................................................................................................189Installing the Trusted Platform Module......................................................................................189Initializing the TPM for BitLocker users......................................................................................190Initializing the TPM for TXT users............................................................................................... 1907 Using system diagnostics................................................................................ 191Dell Embedded System Diagnostics................................................................................................. 191When to use the Embedded System Diagnostics...................................................................... 191Running the Embedded System Diagnostics from Boot Manager............................................ 191Running the Embedded System Diagnostics from the Dell Lifecycle Controller..................... 191System diagnostic controls.........................................................................................................1928 Jumpers and connectors................................................................................ 193System board jumper settings.......................................................................................................... 193System board connectors.................................................................................................................194Disabling a forgotten password........................................................................................................1969 Troubleshooting your system........................................................................ 197Safety first—for you and your system...............................................................................................197Troubleshooting system startup failure............................................................................................197Troubleshooting external connections............................................................................................ 197Troubleshooting the video subsystem............................................................................................. 197Troubleshooting a USB device......................................................................................................... 197Troubleshooting a serial I/O device................................................................................................. 198Troubleshooting a NIC..................................................................................................................... 199Troubleshooting a wet system......................................................................................................... 199Troubleshooting a damaged system............................................................................................... 200Troubleshooting the system battery................................................................................................ 201Troubleshooting power supply units............................................................................................... 201Troubleshooting power source problems.................................................................................202Power supply unit problems.......................................................................................................202Troubleshooting cooling problems................................................................................................. 202Troubleshooting cooling fans.......................................................................................................... 203Troubleshooting system memory....................................................................................................204Troubleshooting an internal USB key.............................................................................................. 205Troubleshooting an SD card............................................................................................................ 205Troubleshooting an optical drive.....................................................................................................206Troubleshooting a hard drive........................................................................................................... 207Troubleshooting a storage controller..............................................................................................207Troubleshooting expansion cards................................................................................................... 208Troubleshooting processors............................................................................................................ 2097