Dell Latitude 3120, Service Manual

Page: 83 / 90

Table 17. Diagnostic LED behavior (continued)
Blinking pattern
Problem description Suggested resolution Amber White
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.
3 6 Flash corruption detected by
SBIOS.
●
Press power button for
over 25 seconds to do
Troubleshooting 83