My HP laptop powers on, but the screen remains black.

[Z2W66EA]

The backlights on my HP EliteBook x360 1030 G2 Product Z2W66EA is broken.

The laptop powers on, I am able to vaguely see the contents on the screen if I hover a torch over the screen.

Can the screen  backlights be replaced without replacing the entire screen?
The laptop is out of warranty, has anyone had their backlights replaced?

[WAWood]

Here's a video from HP Support about diagnosing the issue of the laptop starting but having a black screen instead of any display:

https://www.youtube.com/watch?v=sj6kYmT7GLs