HP Envy x360 convertible Black Screen Capslock LED flashes 3 long and 5 short

[Daggwoodians]

can't do anything without screen 

have tried mostly all resources from the internet 

[WAWood]

This code means that the BIOS is not detecting the processor (CPU) on the motherboard -- meaning the processor has died or the motherboard has died -- and neither of these is replaceable.  So basically, it's a dead laptop.

Is it still within the initial HP Warranty period?

[Daggwoodians]

Checked the warranty it was bought 2 years ago so that is out of the question.

[Daggwoodians]

I actually got it to boot but the bios is not working  

[WAWood]

Maybe we're disagreeing over terms, but if the BIOS did not work, the laptop simply would not work.

So, please explain what you mean by the BIOS not working.