Dell XPS 17 9720 Service Manual - Page 4

Removing the display assembly...33 Installing the display assembly...36 System board...38 System board callouts...38 Removing the system board...38 Installing the system board...40 Antenna...43 Removing the antenna...43 Installing the antenna...44 Palm-rest and keyboard assembly...46 Palm-rest and keyboard assembly...46 Chapter 3: Drivers and downloads 48 Chapter 4: BIOS setup...49 BIOS overview...49 Entering BIOS setup program...49 Navigation keys...49 One time boot menu...50 System setup options...50 Updating the BIOS...61 Updating the BIOS in Windows...61 Updating the BIOS using the USB drive in Windows 61 Updating the BIOS from the F12 One-Time boot menu 62 System and setup password...62 Assigning a system setup password...63 Deleting or changing an existing system setup password 63 Clearing CMOS settings...64 Clearing BIOS (System Setup) and System passwords 64 Chapter 5: Troubleshooting...65 Handling swollen Lithium-ion batteries...65 Dell SupportAssist Pre-boot System Performance Check diagnostics 65 Running the SupportAssist Pre-Boot System Performance Check 66 Built-in self-test (BIST)...66 M-BIST...66 LCD Power rail test (L-BIST)...67 LCD Built-in Self Test (BIST)...67 System diagnostic lights...67 Real-Time Clock (RTC Reset)...68 Recovering the operating system...68 Backup media and recovery options...69 WiFi power cycle...69 Drain residual flea power (perform hard reset)...69 Chapter 6: Getting help and contacting Dell 71 4 Contents