System-diagnostic lights
This section lists the system-diagnostic lights of your OptiPlex All-in-One Plus 7420.
Table 42. System-diagnostic lights
Blinking pattern
Problem descriptionAmber White
1 1 TPM detection failure
1 2 Unrecoverable SPI Flash Failure
1 5 EC unable to program i-Fuse
1 6 Generic catch-all for ungraceful EC code
flow errors
2 1 CPU failure
2 2 System board failure (included BIOS
corruption or ROM error)
2 3 No memory/RAM detected
2 4 Memory/RAM failure
2 5 Invalid memory installed
2 6 System board/Chipset Error
2 7 LCD failure (SBIOS message)
2 8 LCD failure (EC detection of power rail
failure)
3 1 CMOS battery failure
3 2 PCI or Video card/chip failure
3 3 BIOS Recovery image not found
3 4 BIOS Recovery image found but invalid
3 5 Power rail failure
3 6 Flash corruption detected by SBIOS.
3 7 Timeout waiting on ME to reply to HECI
message.
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 stand-alone tool that is preinstalled in all Dell computers that are installed with the 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.
130
Troubleshooting
To Next Page
Loading...
