Recently bought HP laptop broken

[FVR1966]

I bought a HP laptop six months ago. After working properly, it suddenly stopped to work. It didn't start and the screen flashes once when I keep pressed the start button. 

[Elohi_NR]

Hi @FVR1966

Welcome to the HP Support Community. 

I'd like to help!

Let's try these steps.
 

POWER DRAIN:

Please disconnect all the devices and cables connected to your computer including the power cable and then press and hold the power button for about 20 seconds and connect the power cable back again and try to power on the computer.

CBR:

Press windows key and then followed by the key "B" this time and then the power button for around 3-4 seconds, then release the power button and continue to hold windows+B for 3-4 seconds more.

If this does not help, the unit needs to be checked.

Hope this helps! Keep me posted for further assistance.
Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!