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Table 50. System-diagnostic lights (continued)
Blinking pattern
Amber
2
2
2
3
3
3
3
3
3
3
NOTE:
Blinking 3-3-3 LEDs on Lock LED (Caps-Lock or Nums-Lock), Power button LED (without Fingerprint reader), and
Diagnostic LED indicates failure to provide input during LCD panel test on 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
134
Troubleshooting
White
Problem description
6
System board/Chipset Error
7
LCD failure (SBIOS message)
8
LCD failure (EC detection of
1
CMOS battery failure
2
PCI or Video card/chip failure
3
BIOS Recovery image not
4
BIOS Recovery image found
5
6
Flash corruption detected by
7
Timeout waiting on ME to
reply to HECI message.
power rail failure)
found
but invalid
Power rail failure
SBIOS.
Suggested resolution
Replace the system board.
Replace the LCD module.
Replace the system board.
●
Reset the main battery
connection.
●
If problem persists,
replace the main battery.
Replace the system board.
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
Replace the system board.
●
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.
Replace the system board.
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