Several keys on keyboard unresponsive

[MickC99]

Hello all,

Some time ago, I noticed that my laptop was slow to respond to the pressing of several keys. I've now arrived at a point where all of those keys are completely unresponsive. 

The keys are: b, n, CAPS LOCK, +=, f8 (volume up), delete, f12 and the furthest right ALT.

Liquid damage seems impossible, for the keys are fairly spread out. I've tried the following:

- Took out the keys that were not working and cleaned them

- Took a look at the flat cable that connects the keyboard to the mother board, which seems to be working properly

- Cleaned the motherboard from dust (after that, my keyboard functioned properly for about three minutes)

- Installed all newest updates for both my OS and keyboard driver

- Tried a USB-connected keyboard / onscreen keyboard, which all do work properly

- Ran a Component test for the keyboard, which failed

What could possibly be the problem?

Thanks in advance.

Yours sincerely,

Mick

[Echo_Lake]

@MickC99
Thank you for posting on the HP Support Community.

This is the hardware related issue. Hence, I would request you to reach out to our Support and our Support Engineers should be able to check the available service options in order to diagnose the computer physically. HP Support can be reached by clicking on the following link:  www.hp.com/contacthp/

Please feel free to contact us here anytime you need any further assistance. Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.