Dell Inspiron 24 5420 All-in-One Owners Manual - Page 117

Recovering the operating system, Backup media and recovery options

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Table 45. System-diagnostic lights (continued) Blinking pattern Amber White 3 6 3 7 4 1 4 2 Problem description Suggested resolution Flash corruption detected by ● SBIOS. Press power button for over 25 seconds to do RTC reset. If problem persists, replace the system board. ● Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing and holding down power button 3~5 seconds to ensure all power are drained. ● Run "BIOS recovery from USB", and the instructions are in the website Dell support. ● If problem persists, replace the system board. Timeout waiting on ME to reply to HECI message. Replace the system board. Memory DIMM power rail failure Replace the system board. CPU power cable connection issue Replace the system board. 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 Dell Windows Backup Media and Recovery Options. Troubleshooting 117

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Table 45. System-diagnostic lights (continued)
Blinking pattern
Problem description
Suggested resolution
Amber
White
3
6
Flash corruption detected by
SBIOS.
●
Press power button for
over 25 seconds to do
RTC reset. If problem
persists, replace the
system board.
●
Disconnect all power
source (AC, battery, coin
cell) and drain flea power
by pressing and holding
down power button 3~5
seconds to ensure all
power are drained.
●
Run "BIOS recovery from
USB", and the instructions
are in the website
Dell
support
.
●
If problem persists,
replace the system board.
3
7
Timeout waiting on ME to
reply to HECI message.
Replace the system board.
4
1
Memory DIMM power rail
failure
Replace the system board.
4
2
CPU power cable connection
issue
Replace the system board.
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
Dell Windows Backup
Media and Recovery Options
.
Troubleshooting
117