Dell Inspiron 27 7720 All-in-One Owners Manual - Page 113

Table 45. System-diagnostic lights continued, Blinking pattern, Problem description

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Table 45. System-diagnostic lights (continued) Blinking pattern Amber White 1 5 1 6 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 3 1 3 2 3 3 3 4 3 5 Problem description EC unable to program i-Fuse Suggested resolution Replace the system board. Generic catch-all for ungraceful EC code flow errors Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing and holding down power button for 3~5 seconds. CPU failure ● Run the Dell Support Assist/Dell Diagnostics tool. ● If problem persists, replace the system board. System board failure (included ● BIOS corruption or ROM ● error) Flash latest BIOS version If problem persists, replace the system board. No memory/RAM detected ● Confirm that the memory module is installed properly. ● If problem persists, replace the memory module. Memory/RAM failure ● Reset and swap memory modules among the slots. ● If problem persists, replace the memory module. Invalid memory installed ● Reset and swap memory modules among the slots. ● If problem persists, replace the memory module. System board/Chipset Error Replace the system board. LCD failure (SBIOS message) Replace the LCD module. LCD failure (EC detection of power rail failure) Replace the system board. CMOS battery failure ● Reset the main battery connection. ● If problem persists, replace the main battery. PCI or Video card/chip failure Replace the system board. BIOS Recovery image not found BIOS Recovery image found but invalid Power rail failure ● 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. Troubleshooting 113

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Table 45. System-diagnostic lights (continued)
Blinking pattern
Problem description
Suggested resolution
Amber
White
1
5
EC unable to program i-Fuse
Replace the system board.
1
6
Generic catch-all for
ungraceful EC code flow
errors
Disconnect all power source
(AC, battery, coin cell) and
drain flea power by pressing
and holding down power
button for 3~5 seconds.
2
1
CPU failure
●
Run the Dell Support
Assist/Dell Diagnostics
tool.
●
If problem persists,
replace the system board.
2
2
System board failure (included
BIOS corruption or ROM
error)
●
Flash latest BIOS version
●
If problem persists,
replace the system board.
2
3
No memory/RAM detected
●
Confirm that the memory
module is installed
properly.
●
If problem persists,
replace the memory
module.
2
4
Memory/RAM failure
●
Reset and swap memory
modules among the slots.
●
If problem persists,
replace the memory
module.
2
5
Invalid memory installed
●
Reset and swap memory
modules among the slots.
●
If problem persists,
replace the memory
module.
2
6
System board/Chipset Error
Replace the system board.
2
7
LCD failure (SBIOS message)
Replace the LCD module.
2
8
LCD failure (EC detection of
power rail failure)
Replace the system board.
3
1
CMOS battery failure
●
Reset the main battery
connection.
●
If problem persists,
replace the main 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
Replace the system board.
Troubleshooting
113