Chapter 7: Diagnostics; Device Status Lights - Dell Latitude 5480 Owner's Manual

If you experience a problem with your computer, run the ePSA diagnostics before contacting Dell for technical assistance. The
purpose of running diagnostics is to test your computer's hardware without requiring additional equipment or risking data loss. If
you are unable to fix the problem yourself, service and support personnel can use the diagnostics results to help you solve the
problem.
Topics:
•

Device status lights

• Battery status lights
Device status lights
Table 8. Device status lights
Icon Name Description
Turns on when you turn on the computer and blinks when the computer is in a power management
Power
mode.
status light
Battery Turns on steadily or blinks to indicate battery charge status.
charge
indicator
The device status LEDs are usually located either on the top or left side of the keyboard. They display the storage, battery and
wireless devices connectivity and activity. Apart from that they can be useful as a diagnostic tool when there's a possible failure
to the system.
NOTE: The position of the power status light may vary depending on the system.
The following table lists how to read the LED codes when possible errors occur.
Table 9. Battery charge LED indicator
Amber blinking pattern
2,1
2,2
2,3
2,4
2,5
2,6
2,7
3,1
3,2
3,3
3,4
The blinking patterns will consist of 2 set of numbers being represented by (First Group: Amber blinks, Second Group: White
blinks)
NOTE:
Problem description
CPU
System board: BIOS ROM
Memory
Memory
Memory
System board: Chipset
LCD
RTC Power Failure
PCI/Video
BIOS Recovery 1
BIOS Recovery 2
Diagnostics
Suggested resolution
CPU failure
System board, covers BIOS corruption or ROM error
No memory/RAM detected
Memory/RAM failure
Invalid memory installed
System board/Chipset error
Replace the system board
CMOS battery failure
PCI or video card/chip failure
Recovery image not found
Recovery image found but invalid
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Diagnostics 95