Dell OptiPlex 7090 Small Form Factor Service Manual - Page 87

Recovering the operating system

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Table 30. Diagnostic LED behavior (continued) Blinking pattern Amber White 2 6 3 1 3 2 3 3 3 4 3 5 3 6 3 7 4 2 Problem description Suggested resolution ● If problem persists, replace the memory module. System board / Chipset ● Flash latest BIOS version Error / Clock failure / Gate ● If problem persists, A20 failure / Super I/O replace the system board. failure / Keyboard controller failure CMOS battery failure ● Reset the CMOS battery connection. ● If problem persists, replace the RTS battery. PCI or Video card/chip failure Replace the system board. BIOS Recovery image not found ● Flash latest BIOS version ● If problem persists, replace the system board. BIOS Recovery image found ● Flash latest BIOS version but invalid ● If problem persists, replace the system board. Power rail failure ● EC ran into power sequencing failure. ● If problem persists, replace the system board. SBIOS Flash corruption ● Flash corruption detected by SBIOS ● If problem persists, replace the system board. Intel ME (Management Engine) Error ● Timeout waiting on ME to reply to HECI message ● If problem persists, replace the system board. CPU Power Cable Connection Issue 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. Troubleshooting 87

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Table 30. Diagnostic LED behavior (continued)
Blinking pattern
Problem description
Suggested resolution
Amber
White
●
If problem persists,
replace the memory
module.
2
6
System board / Chipset
Error / Clock failure / Gate
A20 failure / Super I/O
failure / Keyboard controller
failure
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
3
1
CMOS battery failure
●
Reset the CMOS battery
connection.
●
If problem persists,
replace the RTS battery.
3
2
PCI or Video card/chip failure
Replace the system board.
3
3
BIOS Recovery image not
found
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
3
4
BIOS Recovery image found
but invalid
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
3
5
Power rail failure
●
EC ran into power
sequencing failure.
●
If problem persists,
replace the system board.
3
6
SBIOS Flash corruption
●
Flash corruption detected
by SBIOS
●
If problem persists,
replace the system board.
3
7
Intel ME (Management
Engine) Error
●
Timeout waiting on ME to
reply to HECI message
●
If problem persists,
replace the system board.
4
2
CPU Power Cable Connection
Issue
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
.
Troubleshooting
87