Multiple things. for starters, number keys aren't working

[Samurott]

How do I put back a key that popped out. and also can you explain why some keys aren't responding

[BeemerBiker]

Laptop keys can be replaced. Some models are more difficult than others. Usually it is easier to replace a key or two than the keyboard.

To replace your keyboard, go to this site and enter your serial number. Look for the keyboard with the correct language.


There are a number of companies that can provide keys.  Some have a video or two showing how to do it.

https://www.laptop-keys.com/
https://www.google.com/search?q=ebay+replace+key+on+hp+laptop
https://www.laptopkeyreplacements.com/brands/hp.html
https://laptopkey.com/hp
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Have you run diagnostics?
Tap the ESC key after powering on and press F2 to run diagnostics.
If the keys fail during diagnostics then there is a hardware defect.

Click here to check warranty
and
Click here for world-wide contact info

If the bad keys work during diagnostics then a problem with windows drivers or sticky keys

Let me know what you find out.