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 19. Diagnostic-light LED codes
Diagnostic light codes
(Amber,White)
Problem description
2,1
Processor failure
2,2
System board: BIOS or ROM (Read-Only
Memory) failure
2,3
No memory or RAM (Random-Access Memory)
detected
2,4
Memory or RAM (Random-Access Memory)
failure
2,5
Invalid memory installed
2,6
System-board or chipset error
2,7
Display failure - SBIOS message
3,1
Coin-cell battery failure
3,2
PCI, video card/chip failure
3,3
Recovery image not found
3,4
Recovery image found but invalid
3,5
Power-rail failure
3,6
System BIOS Flash incomplete
3,7
Management Engine (ME) error
Recovering the operating system
When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operating
system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating
system. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its
factory state.
110
Troubleshooting
Содержание Inspiron 7400
Страница 15: ...Major components of your system 1 Base cover 2 Power adaptor port 3 Major components of your system 15 ...
Страница 19: ...4 Lift and remove the base cover from the computer Removing and installing components 19 ...
Страница 60: ...3 Route the antennae and display cable along the hinges 60 Removing and installing components ...
Страница 82: ...Figure 3 Power button board without FPR 82 Removing and installing components ...
Страница 84: ...Figure 5 Power button board without FPR 84 Removing and installing components ...
