Laptop doesnt boot. Black screen, F12 light is on, Capslock blink only Once. Hard Reset doesn't help

[SH_Architect]

Hello profi team, 

my laptop doesnt boot. After pushing ON button laptop starts normally, but screen stays black.  Connected display showing nothing. After pushing "Start button" the F12(wireless) button lights orange and doesnt blink, but Capslock blinks only once.  If i push Capslock it stays lighting.

Hardreset with WIN+B or WIN+V doesng help. But if i pushing something  than Capslock doesnt blink at all.  

On HP page found That 1 Capslock blink means cpu failure. I have ordered new one, replaced, but it also doesnt work.

For like a year i had allready problem with BIOS. Same black screen, but with Capslock blinking two times. Problem was solved with BIOS update after hard reset. 

Laptop is in good condition outside and inside.

Now after seeking of right path I'm staying in a corner with the dream about getting a ladder to climb on that maze wall and to see what shall i do next to solve my problem.

Thanx for help!

[The_Fossette]

@SH_Architect,

Welcome to the HP Support Community!

I see that you have already performed all the relevant steps and it looks like a hardware issue.

I recommend you contact support and they will assist you in this regard.

Here is how you can get in touch with tech support.

1)Click on this link – www.hp.com/contacthp/

2)Select the product type.

3)Enter the serial number of your device or select let HP detect your product option.

4)Select the country from the drop-down.

5)You should see the HP phone support number or Chat option listed.

Let me know how it goes and you have a great day!

If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!

Cheers!