Question about Dell Inspiron 6400 Notebook

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Some keys on my keyboard not working

Some of the keys on my laptop not working.The list is as follows Plus Minus Delete Home Insert F8 F9 Please help me in resolving this issue.

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1.If cause by tea or drinks,disconnect the keypad from the system and dip it in warm water for 10mins shake it,press each key several times while still in water. Dry it thoroughly to have the water off the keypad and fix it back. 2.if the problem still exist, change the keypad.

Posted on Oct 04, 2007


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Posted on Jan 02, 2017


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My Toshiba satellite C650 laptop has certain keys that don't respond, certain letters, spacebar, shift. I replaced the keyboard, but the same problems persist. The keys that do not function are for example...

you need to open the computer
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Aug 18, 2013 | Computers & Internet

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All numeric keys not working

Check the settings in the BIOS to see if they are disabled. If the are not, use a portable keyboard to see if the number keys work. If they do, check the device manager to see what the keyboard is listed as. You can delete it from the list and have it redetected. IF that does not work, OEM says that you restore the computer to factory settings. If that fails then you replace the keyboard.

Jul 29, 2013 | Acer Aspire 5315-2153 Notebook

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go into add remove hardware in the control panel and delete the aux keyboard

Apr 24, 2013 | HP Mini Computers & Internet

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Shift, tab and wqdf not working on keyboard

The keyboard will need to be replaced, go to Type make and model of laptop, refine search to keyboard and go through the list of prices. Before you replace the keyboard hook external keyboard to the laptop to verify operation.

Jul 11, 2012 | Samsung N150 Notebook

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Nabasa po ng juice laptop ko gagana pa o ba ito panu po mgtrouble shoot

if you have a keyboard modeled 2000 up there should be no problem it should still work, but frst you should clean and dry up your keyboard, try to list down your entire keyboard keys and take off all keys then wipe it dry just DONT soak it in water, gagana pa iyan

Sep 23, 2009 | Fujitsu Computers & Internet

1 Answer

Keyboard problem: multiple letters when one is pressed

sorry but even a small amount of liquid can work its way under the keys. you could try getting a can of compressed air to dissipate the liquid that has seeped under the keys, if not then you will need a new keyboard or take the keyboard apart

Jul 07, 2009 | Sony VAIO VGN-NR120E/S Notebook

1 Answer

Keyboard won't stop repeating the hyphen/underscore key.


You have few solutions to this

  1. disconnect the keyboard flex cable from the motherboard so the keyboard is not connected at all.
  2. replace the keyboard
On option 1 you would need to take the laptop apart from the top so that you can take the keyboard out so that you can disconnect the cable, then place it back in.

On option 2 you would also need to take the laptop apart / open it from the top to get the keyboard out and disconnect the cable. and replace it with a new keyboard.

Look around ebay for the correct keyboard for your model, here is a ebay listing for acer laptop keyboards

Thanks and good luck.

May 03, 2009 | Acer Computers & Internet

1 Answer

Keyboard problem

You just need a new keyboard - those are easy to come by check and search for C640 keyboard. New ones should only be about $30-$40.

To remove the keyboard you just remove all the screws on the bottom of the laptop that are marked with the letter "K" then carefully pop the keyboard up.

Let us know if you need further help!

Jan 12, 2008 | Dell Latitude C640 P4 Mobile Notebook

2 Answers


This is a rather old question, but the solution might still be helpful to other readers.

I suggest you call Tech Support at Dell...

Several years ago, I worked on many Dell CPx 500 models in my work place. There was an issue that always involved a series of 4 or 5 keys (they were always the same keys) that would quit working and we had attempted to purchase new keyboards to fix the issue. It turned out, the real solution was to replace the 'motherboard' of the Latitude notebook!

Dell had knowledge about the keyboard/motherboard issue that we didn't know.

Jan 11, 2008 | Dell Latitude C640 Notebook

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