Keyboard types two letters instead of one letter

posted in: Keyboard | 8

Problem description:

When you press on a keyboard key, it types two letters instead of one letter. For example, when you pressed on the letter “A” it types “AS”.
It happens only with some keys. All remaining keys work properly. You reinstalled the operating system but it didn’t fix the problem.

Possible cause:

1. Bad connection between the keyboard cable and motherboard.
2. Failed keyboard.
3. Failed keyboard controller on the motherboard.

Possible troubleshooting steps and repair solution:

When your keyboard starts typing two letters instead of one most likely you have a failed keyboard. Before you replace the keyboard with a new one, try reconnecting the keyboard cable. It’s possible that contacts inside the connector got oxidized and the cable doesn’t make good connecting with the motherboard.

If reconnecting the cable doesn’t help, replace the keyboard with a new one.

If you still experiencing the same problem even after replacing the keyboard, most likely you have a problem with the keyboard controller on the motherboard. If that’s the case, you’ll have to replace the whole motherboard.

8 Responses

  1. I face a problem on my laptop keyboard of compaq. it is showing number while pressing alphabet on some particular keys.>please tell me how can i remove it .

  2. After a long long time I decided to clean the gunge off my keyboard so I dismantled it to find I really didn’t need to. However, one day later (tonight) it started typing three letters at a time! I must have cleaned it too well I thought! I switched it off and on a couple of times but that didn’t work so I decided to log off and then on again. Bad move as I then found that logging on still had the same problem. Can’t do that too much or you get locked out altogether! So I got the boy’s laptop to do a search for the solution. Several I see had the exact same problem but I decided to take the keyboard plug out from the PC and reconnect it. Bingo! I could log on with no triple letters or numbers! Cheaper than a new keyboard being suggested on other blogs!

  3. Ariana

    I was typing and then i noticed that there was o’s coming after it. It was a lot of o’s.

  4. laptop repair Manchester

    Im having the same problem with a Compaq CQ61, only a couple of keys when pressed type 2 instead of 1.

    I have plugged in a USB keyboard and that has worked fine, I have reconnected the laptop cable and cleaned the connection.

    Ive also run Malwarebytes and and installed all latest updates and drivers, and updated BIOS. So before I buy a new keyboard is their anything else I can try?

  5. Laptop Repair Guy

    ali fah,

    i had the exact same problem in my hp laptop…
    a=as
    s=as
    q=qw
    w=qw

    that was weird, but after 10 mins of searching for a solution and doing nothing… it was back to normal!

    I don’t think that your problem is gone forever. Most likely it will reappear after some time.
    If the problem comes back, try reconnecting the keyboard cable first. It’s possible the connection between the keyboard and motherboard is bad and reconnecting the cable will fix it.

  6. ali fah

    i had the exact same problem in my hp laptop…
    a=as
    s=as
    q=qw
    w=qw

    that was weird, but after 10 mins of searching for a solution and doing nothing… it was back to normal!

    now im writing on it… and it works fine…
    so before u go buy another keyboard… just w8 for it

  7. Laptop Repair Guy

    Chris,

    my laptop Toshiba satellite L45,S7423,letter E in the keyboard is failed to work and it one of lock in key letters it could not lock me in, so I try to connect external keyboard work normal. the same key can some time work for 2 minutes or less than minutes and stop again.
    what could be the problem and can I go about this problem on laptop?

    If only one key is failing, most likely this is the keyboard problem. The keyboard cannot be disassembled and repaired. You’ll have to replace the keyboard.
    Here are keyboard part numbers for a Satellite L45-S7423 laptop:
    US English keyboard: H000001790 or H000000990 or H000006820 (either one will work).
    Google the part number and find a new keyboard.
    You can replace the keyboard.
    1. Remove two screws securing the keyboard on the bottom. This screws are shown in the step 3. One of the on the left side from the wireless card and another one on the right side from the memory module.
    2. Remove keyboard.

  8. my laptop Toshiba satellite L45,S7423,letter E in the keyboard is failed to work and it one of lock in key letters it could not lock me in, so I try to connect external keyboard work normal. the same key can some time work for 2 minutes or less than minutes and stop again.
    what could be the problem and can I go about this problem on laptop?
    I am for help .

    Regards

    Chris

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