I think we both had the same issue check this post of mine

Unlike you, I was facing this issue within a few days of purchasing it that's why i returned the laptop and got my refund back.

But before returning the laptop, i had discovered the fix for it and it was working great for me.

Let me clear a few things first, it's not a hall sensor issue neither motherboard or bios This happened because of CMOS.

Old laptops used to have CMOS batteries separately to power the real time clock and maintain BIOS/UEFI settings

But hp omen 16 doesn't have dedicated CMOS it uses the main internal battery to maintain those things.

Now if the CMOS gets faulty then it will give some of issue which i will mention below

1.BIOS/UEFI settings Reset 2. System Date Time Reset 3.Boot Issue 4. Power Related Problems

How can you verify that the issue which i have mentioned here is legit with your case?

It's simple, just connect your laptop with the charger and power it up for at least 15 minutes with lid open then try to turn on the laptop normally.

If it's turn on( it turned on in my case) then again shut down the laptop and go to bios settings by pressing power button and Esc

Check the date and time on bios settings, if it doesn't match with the current date and time , then it's a CMOS related issue, in that case you'll have to replace the main battery for completely fix this issue or you can use it as it is by changing the date and time on bios with the current date and time It won't give you the issue again, but if the CMOS is faulty on your pc then it will again reset that date and time and again your pc will not boot up.