ianh21
2 Bronze

Dell E7240 keyboard not working

hi

i purchased a used dell E7240 and it was grade c so some issues.  the laptop works perfectly well apart from the keyboard.  it was a backlit.  i replaced with a non backlit and now the keyboard and touchpad do not work.  updated bios to latest and also windows 10 etc but nothing. 

i downloaded the drivers on the dell website but they fail immediately. 

it seems to be a known problem, DELL, how do i fix it, do i need to buy a new backlit keyboard?

i will try downgrading the bios next.

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8 Replies
DELL-Jesse L
Community Manager
Community Manager

RE: Dell E7240 keyboard not working

ianh21,

Check your connections for the keyboard. If the previous keyboard was not working on the computer it could be the connection to the motherboard. Return the other one you purchased and get another backlit keyboard. 

How to Troubleshoot the Backlit Keyboard on Your Dell Notebook Computer

 



 

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

the old keyboard didn't work.  

the mousepad is now working since i ran dell system diagnosis but no joy with the keyboard.

under device manager it shows as a standard ps2 keyboard so it must detect it.

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

my bios, latest version, doesn't show any keyboard options.

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

could this be a problem with the motherboard?  

i cannot return, over 30 days.

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DELL-Jesse L
Community Manager
Community Manager

RE: Dell E7240 keyboard not working

ianh21,

Yes, it very could be the motherboard connection. Can you plug an external keyboard in the computer? If so, run the diags by following the information below.

  1. Power-on the 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.
    The Enhanced Pre-boot System Assessment window is displayed, listing all devices detected in the computer. The diagnostics starts running the tests on all the detected devices.
  4. If you wish to run a diagnostic test on a specific device, press <Esc> and click Yes to stop the diagnostic test.
  5. Select the device from the left pane and click Run Tests.
  6. If there are any issues, error codes are displayed. 

 



 

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

hi

ok, touchpad works, replacement brand new backlit keyboard doesn't work still.

ran diagnostics and this shows:

Cables - various tests

test result: fail

Error code: 2000-0415

Validation: 91253

Msg: Cables - check the following cable, jumper, connection or sensor: Keyboard

ended.

what exactly is wrong then?  motherboard connection?

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

any response?

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ianh21
2 Bronze

RE: Dell E7240 keyboard not working

hi

any further help, see below post.

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