Table 20. LED codes
Diagnostic light codes
Problem description
2,1
Processor failure
2,2
System board: BIOS or ROM (Read-Only
Memory) failure
2,3
No memory or RAM (Random-Access Memory)
detected
2,4
Memory or RAM (Random-Access Memory)
failure
2,5
Invalid memory installed
2,6
System-board or chipset error
2,7
Display failure
3,1
Coin-cell battery failure
3,2
PCI, video card/chip failure
3,3
Recovery image not found
3,4
Recovery image found but invalid
Camera status light:
Indicates whether the camera is in use.
●
Solid white — Camera is in use.
●
Off — Camera is not in use.
Caps Lock status light:
Indicates whether Caps Lock is enabled or disabled.
●
Solid white — Caps Lock enabled.
●
Off — Caps Lock disabled.
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 10 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
Flashing the BIOS
About this task
You may need to flash (update) the BIOS when an update is available or when you replace the system board.
Follow these steps to flash the BIOS:
Steps
1. Turn on your computer.
2. Go to
.
3. Click
Product support
, enter the Service Tag of your computer, and then click
Submit
.
Troubleshooting
71
