Help with Bricked Yi Camera

[pomtom44]

Hiya everyone

My friend had a Yi Home camera, and was messing around with the files on it, Not sure what he was doing, but somehow he bricked the camera.
He's given it to me as he doesnt know enough about them and can't be bothered fixing it, so i said id have a look and give it a go.

When booting up the yellow LED stays lit and nothing else happens,
At a guess I think he may have modified one of the core linux files and has bricked the internal OS

I have tried flashing the firmware by downloading various versions from different sites, but nothing seems to work
Sometimes the orange led will flash for a few moments when booting, then just go back to being solid
Other times it just stays solid.

Any ideas on what I can try next?
Thanks

[Hackentosher]

If flashing firmware didn't work... 

 

F