Table 25. System-diagnostic lights (continued)
Blinking pattern
Problem description
Suggested resolution
Green
5
Memory
Invalid memory installed
6
System board or Chipset
System board/chipset error
7
Display
Display failure
1
RTC power failure
Coin-cell battery failure
2
PCI/Video
PCI/Video card/chip failure
3
BIOS recovery 1
Recovery image not found
4
BIOS recovery 2
Recovery image found but invalid
5
Power Rail Failure
EC ran into power sequencing failure
6
SBIOS Flash Corruption
Flash corruption detected by SBIOS
7
ME Error
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 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
.
Real-Time Clock (RTC Reset)
The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell systems from No POST/No
Power/No Boot situations. The legacy jumper enabled RTC reset has been retired on these models.
Start the RTC reset with the system powered off and connected to AC power. Press and hold the power button for
thirty (30) seconds
. The system RTC Reset occurs after you release the power button.
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
.
124
Troubleshooting
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