Laptop failing to boot up

[Rosco83]

My HP laptop was failing to boot up - i followed the steps described on youtube to try and reset the battery

Now I am presented with a black screen and the power light is not lighting up when pressed.  

The only response I am getting from the device is when I hold down the power button + windows key + B for 30 seconds, after which the power light comes on for a few seconds, the caps lock key lights up and then the power light goes out after 5 seconds.

[Lil_Boy_Blue]

Hi
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

NOW begin checking/testing/proving the Hardware is fit for purpose.

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

[Rosco83]

the device in question is a laptop, these seem to be instructions for a desktop

[Lil_Boy_Blue]

AND did they work?

[Rosco83]

Hello

no they didnt work, couldnt get by the first few steps as the laptop is not powering up

[Lil_Boy_Blue]

So it is a second opinion from a local repair shop.

It does not seem like it passes POST (Power On Self Test).

Hardware problem, like the Main Board.