Dell Inspiron 17 7778 2-in-1 Inspiron 177000 Series 2-in-1 Service Manual - Page 150

System diagnostic lights

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System diagnostic lights Power and battery-status light/hard-drive activity light Indicates the battery-charge status or the hard-drive activity. NOTE: Press Fn+H to toggle this light between power and battery-status light and hard-drive activity light. Hard-drive activity light Turns on when the computer reads from or writes to the hard drive. Power and battery-status light Indicates the power and battery-charge status Solid white - Power adapter is connected and the battery has more than 5 percent charge. Amber - Computer is running on battery and the battery has less than 5 percent charge. Off • Power adapter is connected and the battery is fully charged. • Computer is running on battery and the battery has more than 5 percent charge. • Computer is in sleep state, hibernation, or turned off The power and battery-status light blinks amber along with beep codes indicating 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 light patterns, what they indicate, and the suggested solutions. Light pattern 2,1 2,2 2,3 Problem description CPU failure System board: BIOS and ROM failure No memory or RAM detected Suggested solution Replace the system board. Flash latest BIOS version. If problem persists, replace the system board. Confirm that the memory module is installed properly. If 150

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System diagnostic lights
Power and battery-status light/hard-drive activity light
Indicates the battery-charge status or the hard-drive activity.
NOTE:
Press Fn+H to toggle this light between power and battery-status
light and hard-drive activity light.
Hard-drive activity light
Turns on when the computer reads from or writes to the hard drive.
Power and battery-status light
Indicates the power and battery-charge status
Solid white
— Power adapter is connected and the battery has more than 5
percent charge.
Amber
— Computer is running on battery and the battery has less than 5
percent charge.
Off
•
Power adapter is connected and the battery is fully charged.
•
Computer is running on battery and the battery has more than 5 percent
charge.
•
Computer is in sleep state, hibernation, or turned off
The power and battery-status light blinks amber along with beep codes
indicating 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 light patterns, what they indicate, and the
suggested solutions.
Light pattern
Problem description
Suggested solution
2,1
CPU failure
Replace the system board.
2,2
System board: BIOS and
ROM failure
Flash latest BIOS version. If
problem persists, replace the
system board.
2,3
No memory or RAM
detected
Confirm that the memory
module is installed properly. If
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