Envy 13 ah0003na dead. Only power flashes.

[F311d0wn]

HP laptop dead. Only power button blinks. Help?

HP Envy 13-ah0003na.
https://streamable.com/o3yne7

No signs of life other than this blink of the power button. Seems to be on for 8s, off for 1s, on for 2s.

No display, fan spin etc.

When charger plugged in, white 'charged' light comes on.

I have tried removing charger, pressing and holding power button for 15,30,60s (depending on whose advice I read).

Also tried bios/cmos reset win+v/b + power 2-3s, hold win v/b til screen comes on (didn't work).

Any ideas? I've had a brief look in the maintenance guide below but not found anything relevant yet.
https://support.hp.com/us-en/product/hp-envy-13-ah0000-laptop-pc-series/20283122/model/22833661/manu...

I have found this page, which helpfully doesn't outline the correct light flashing:
https://support.hp.com/us-en/document/ish_1997719-1528356-16

And this YouTube video, similarly unhelpful:
https://youtu.be/5MNl-_uNOWM

[sandytechy20]

@F311d0wn 

Welcome to the HP support community.

I understand that the notebook is not powering on, I am glad to assist you.

This might require one on one interaction to fix the issue, I am sending you a private message with the steps to talk to HP support.

Please check the mailbox icon at the top-right corner of this screen.

I hope this helps resolve this issue completely.

If this helps, please mark the public post as an accepted solution so that it benefits several others.

Cheers

[F311d0wn · Accepted solution]

Hi, I took it to an independent repair shop and they diagnosed a motherboard fault (not 100% sure what exactly). Replacement mobo from HP costs £1400 (Soldered ram, cpu, gpu) so obviously this isn't an option, so they will attempt to repair motherboard.