System-Diagnostic Lights - Dell Latitude 7200 2-in-1 Service Manual

System-diagnostic lights

Power and battery-status light
The power and battery status light indicates the power and battery status of the computer. These are the power states:
Solid white:Power adapter is connected and the battery has more than 5% charge.
Amber:Computer is running on battery and the battery has less than 5% charge.
Off:
● Power adapter is connected, and the battery is fully charged.
● Computer is running on battery, and the battery has more than 5% charge.
● Computer is in sleep state, hibernation, or turned off.
The power and battery-status light may blink amber or white according to pre-defined "beep codes" indicating various failures.
For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times
followed by a pause. This 2,3 pattern continues until the computer is turned off, indicating no memory or RAM is detected.
The following table shows different power and battery-status light patterns and associated problems.
NOTE: The following diagnostic light codes and recommended solutions are intended for Dell service technicians to
troubleshoot problems. You should only perform troubleshooting and repairs as authorized or directed by the Dell technical
assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty.
Table 18. Diagnostic-light LED codes
Diagnostic light codes
(Amber,White)
2,1
2,2
2,3
2,4
2,5
2,6
2,7
3,1
3,2
3,3
3,4
3,5
3,6
3,7
98 Troubleshooting
Problem description
Processor failure
System board: BIOS or ROM (Read-Only
Memory) failure
No memory or RAM (Random-Access
Memory) detected
Memory or RAM (Random-Access
Memory) failure
Invalid memory installed
System-board or chipset error
Display failure - SBIOS message
Coin-cell battery failure
PCI, video card/chip failure
Recovery image not found
Recovery image found but invalid
Power-rail failure
System BIOS Flash incomplete
Management Engine (ME) error
Recommended solutions
Replace the system board.
Flash latest BIOS version. If problem persists, replace
the system board.
Confirm that the memory module is installed properly.
If problem persists, replace the memory module.
Reset and swap memory modules among the slots. If
problem persists, replace the memory module.
Reset and swap memory modules among the slots. If
problem persists, replace the memory module.
Flash latest BIOS version. If problem persists, replace
the system board.
Replace display cable (EDP) if possible, otherwise
replace the display assembly (LCD).
Reset the CMOS battery connection. If problem
persists, replace the RTC 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.
EC ran into power sequencing failure. If problem
persists, replace the system board.
Flash corruption detected by SBIOS. If problem
persists, replace the system board.
Timeout waiting on ME to reply to HECI message. If
problem persists, replace the system board.