Recovering The Operating System - Dell W24C Service Manual

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Blinking Amber – The computer is unable to boot to the operating system. This indicates that the power supply is normal but
another device in the computer is failing or not installed properly.
NOTE:
See the light patterns to determine the device that is failing.
Off – Computer is in hibernation or turned off.
The power status light blinks amber along with beep codes indicating failures.
For example, the power 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/RAM detected.
The following table shows different light patterns and what they indicate:
Table 14. System diagnostic lights
Light pattern
1,2
2,1
2,2
2,3
2,4
2,5
2,6
2,7
3,1
3,2
3,3
3,4
3,5
3,6
3,7
The computer may emit a series of beeps during start-up if the errors or problems cannot be displayed. The repetitive beep
codes help the user troubleshoot problems with the computer.
Camera status light: Indicates whether the camera is in use.
● Solid white – Camera is in use.
● Off – Camera is not in use.

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.
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Troubleshooting
Problem description
Unrecoverable SPI flash failure
CPU failure
System board failure, corrupt BIOS, ROM error
No memory/RAM detected
Memory or RAM failure
Invalid memory installed
System board error, chipset error, clock failure, gate A20 failure, keyboard
controller failure
Display failure
CMOS battery failure
PCIe or video card/chip failure
BIOS recovery image not found
BIOS recovery image found but invalid
Power rail failure
Paid SPI volume error
Intel ME (Management Engine) error

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