Service Manual

Table 18. Power and battery-charge status light (continued)

Power and battery-charge status light Status of computer

Off The computer is in sleep state, hibernation, or turned off.

Blinking power and battery-charge status light

The power and battery-status light blinks alternately between amber and off to indicate issues that your computer is

encountering.

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times

followed by a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.

The following table shows the different power and battery-status light patterns and the associated issues.

Table 19. 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

2,8 LCD power rail failure.

3,1 CMOS battery failure

3,2 PCI, video card/chip failure

3,3 Recovery image not found

3,4 Recovery image found but invalid

3,5 Power-rail failure

3,6 System BIOS Flash incomplete

3,7 Management Engine (ME) error

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

www.dell.com/support.

Troubleshooting