having a problem with keyboard where some keys when pressed give two responses

[DCHIRAZG]

I'm troubleshooting a laptop I bought in 2016 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,

[Rainbow23]

Hi @DCHIRAZG,

Welcome to HP Support Community. 
 

I see that you are facing issues with your HP product.

This could be a hardware issue with the keyboard and may need repair. 

I suggest that you contact HP Service Center in your location from this weblink: https://support.hp.com/us-en/help/service-center 
Note: Select your country from the dropdown,  enter the city or postal code, select the product, change the radius, and click on search to locate the nearest HP Service center near your location.

Hope this helps.
Take care and have a good day.

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