Recovering The Operating System; Backup Media And Recovery Options - Dell Inspiron 24 5420 Owner's Manual

Table 45. System-diagnostic lights (continued)
Blinking pattern
Amber
3
3
4
4
NOTE: Blinking pattern 3-3-3 on Lock LED (Caps-Lock or Num-Lock), Power button LED (without Fingerprint reader),
and Diagnostic LED indicates failure to provide input during LCD panel test on the "Dell SupportAssist Pre-boot System
Performance Check" diagnostics.

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.

Backup media and recovery options

It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes
multiple options for recovering Windows operating system on your Dell PC. For more information. see
Media and Recovery Options.
White Problem description
6 Flash corruption detected by
7 Timeout waiting on ME to
reply to HECI message.
1 Memory DIMM power rail
2 CPU power cable connection
Suggested resolution
●
SBIOS.
●
source (AC, battery, coin
cell) and drain flea power
● Run "BIOS recovery from
USB", and the instructions
●
replace the system board.
Replace the system board.
Replace the system board.
failure
Replace the system board.
issue
Press power button for
over 25 seconds to do
RTC reset. If problem
persists, replace the
system board.
Disconnect all power
by pressing and holding
down power button 3~5
seconds to ensure all
power are drained.
are in the website Dell
support.
If problem persists,
Dell Windows Backup
Troubleshooting 117