From today itself when I started my laptop it was behaving bit weirdly I was not able to use my keys

[mohitrainbird]

While starting my laptop i was unable to login because keys were not responsive. I again restarted my laptop again the same issue. Then I rebooted it and while it was turning on I kept on pressing F5 key. I got the login page and this time all the keys were working properly. But again when I rebooted my laptop all the alphanumeric keys stopped working. So whenever i am using F5 key while turning my laptop on I am able to use alphanumeric keys to login otherwise my Laptop doesn’t start. 

[Lil_Boy_Blue]

Hi

Could you please remove the picture showing the serial number, the J8B78PA is all that is needed to ID the product as a

HP 15-r032tx Notebook PC

At POWER ON is there a method to run diagnostics?

EG:

First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat

AND/OR - Power on your PC, press Esc (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).
AND/OR
HOW DO I USE DIAGNOSTICS?

HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine if the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures. HP PC Hardware Diagnostics Windows comes pre-installed on new HP computers, but if not on yours, download here:- http://ftp.hp.com/pub/softpaq/sp93001-93500/sp93457.exe

[mohitrainbird]

Nothing happened. The keypad is still not working. I have to repeatedly press the F5 button while booting my laptop to activate keypad otherwise there is no response from any of the alphanumeric keys. Please help. 

[Lil_Boy_Blue]

Hi

The F5 key is normally a Refresh action, and it function during boot-up I don't know.

In the BIOS it would be to select a different Boot option, along with F6.

So other than suggesting a scan for rootkits, or a BIOS update I cannot help any further.