Recovering The Operating System; Wi-Fi Power Cycle - Dell XPS 17 9730 Service Manual

Table 22. LED codes (continued)
Diagnostic light codes
2,5
2,6
2,7
2,8
3,1
3,2
3,3
3,4
3,5
3,6
3,7

Recovering the operating system

When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operating
system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating
system. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its
factory state.
You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their
primary operating system due to software or hardware failures.
For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at
www.dell.com/serviceabilitytools. Click SupportAssist and then, click SupportAssist OS Recovery.

Wi-Fi power cycle

About this task
If your computer is unable to access the Internet due to Wi-Fi connectivity issues a Wi-Fi power cycle procedure may be
performed. The following procedure provides the instructions on how to conduct a Wi-Fi power cycle:
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
66 Troubleshooting
Problem description
Invalid memory installed
System board or chipset error
Display failure - SBIOS message
Display failure - EC detection of power rail
failure
Coin-cell battery failure
PCI, video card/chip failure
BIOS Recovery Image not found
Recovery image found but invalid
Power-rail failure
System BIOS Flash incomplete
Management Engine (ME) error
Recommended Solution
Reseat and swap memory modules between the slots.
If the problem persists, replace the memory module.
Replace the system board.
Replace the LCD module.
Replace the system board.
Reset the CMOS battery connection. If the problem
persists, replace the RTC battery.
Replace the system board.
Flash latest BIOS version. If the problem persists,
replace the system board.
Flash latest BIOS version. If the problem persists,
replace the system board.
Replace the system board.
Replace the system board.
Replace the system board.