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Laptop keyboard types multiple adjacent letters with some keys

HP Recommended
HP laptop model 14-cf0006dx
Microsoft Windows 10 in S Mode

I'm troubeshooting a laptop I bought last year for our church, which is suddenly having a problem with its keyboard where some keys when pressed give two responses - that key and an adjacent key.  For example, pressing either "1" or "q" gives "q1".  I likewise see w2, e3, 4r, 9o, 0p (also the left and right arrows trigger simultaneously, as do up and down).

 

Here's what I've learned so far from troubleshooting:

1. An external keyboard works fine (that's how I'm typing this)

2. A full reset of the computer failed to help

3. Uninstalling the keyboard drivers and letting it reinstall failed to help 

4. My keyboard layout is US

5. I've made sure that sticky keys and filter keys and everything like that is turned off

6. I used the Keyboard Component Test under the hardware diagnostics, and that replicates the problem (when I press either "q" or "1" it shows both "q" and "1" lighting up on the diagnostic model), but strangely when I am done it says that the keyboard passed the test.  Apparently it has low standards.  

 

That exhausts the suggestions I've been able to find online.  Does anyone have any idea what I should do next?

Thanks,

Steven

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hmm this is a interesting problem. Did you use any compressed air to see if there is any dust or dirt getting under the keys? Since you bought it last year I supposed your warranty is probably no good. I guess you could try calling tech support.

Thomas Lohse
Long time HP user owner and supporter
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