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NOTE:
Some tests for specific devices require user interaction. Always ensure that you are present at the computer terminal
when the diagnostic tests are performed.
For more information, see
.
Running the ePSA diagnostics
1
Turn on your computer.
2
As the computer boots, press the F12 key as the Dell logo appears.
3
On the boot menu screen, select the
Diagnostics
option.
4
Click the arrow at the bottom left corner.
Diagnostics front page is displayed.
5
Click the arrow in the lower-right corner to go to the page listing.
The items detected are listed.
6
To run a diagnostic test on a specific device, press Esc and click
Yes
to stop the diagnostic test.
7
Select the device from the left pane and click
Run Tests
.
8
If there are any issues, error codes are displayed.
Note the error code and validation number and contact Dell.
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.
NOTE:
Hard-drive activity light is supported only on computers shipped with 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
NOTE:
Hard-drive activity light is supported only on computers shipped with hard drive.
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 and describes what they indicate.
86
Troubleshooting
Summary of Contents for Inspiron 7786
Page 1: ...Inspiron 7786 Service Manual Regulatory Model P36E Regulatory Type P36E001 ...
Page 22: ...Post requisites Replace the base cover 22 Replacing the battery ...
Page 34: ...Post requisites 1 Replace the battery 2 Replace the base cover 34 Replacing the hard drive ...
Page 36: ...36 Removing the solid state drive Intel Optane memory module ...
Page 39: ...Replacing the solid state drive Intel Optane memory module 39 ...
Page 43: ...Removing the wireless card 43 ...
Page 64: ...64 Removing the palm rest ...