Dell Latitude 7200 2-in-1, Руководство по обслуживанию

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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)
Problem description Recommended solutions
2,1 Processor failure Replace the system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure Flash latest BIOS version. If problem persists, replace
the system board.
2,3 No memory or RAM (Random-Access
Memory) detected Confirm that the memory module is installed properly.
If problem persists, replace the memory module.
2,4 Memory or RAM (Random-Access
Memory) 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 or chipset error Flash latest BIOS version. If problem persists, replace
the system board.
2,7 Display failure - SBIOS message Replace display cable (EDP) if possible, otherwise
replace the display assembly (LCD).
3,1 Coin-cell battery failure Reset the CMOS battery connection. If problem
persists, replace the RTC battery.
3,2 PCI, video card/chip failure Replace the system board.
3,3 Recovery image not found Flash latest BIOS version. If problem persists, replace
the system board.
3,4 Recovery image found but invalid Flash latest BIOS version. If problem persists, replace
the system board.
3,5 Power-rail failure EC ran into power sequencing failure. If problem
persists, replace the system board.
3,6 System BIOS Flash incomplete Flash corruption detected by SBIOS. If problem
persists, replace the system board.
3,7 Management Engine (ME) error Timeout waiting on ME to reply to HECI message. If
problem persists, replace the system board.
98 Troubleshooting