Unsuccessful firmware upgrade

[Yuri Polyarush]

After firmware upgrade only RED logo appears, then 4,7'' screen goes dark. Fans are working as usual, but the camera is not functioning. Hard reset does not help.
Hoping for any feedback or recommendations!

 

[Phil Holland]

How long are you leaving it before powering down? Occasionally if there's a firmware update that might impact a screen I noticed you might lose picture for a bit. I'd leave it powered on for about 10 minutes and see if it's trying to complete an update. Also, make sure you are using the appropriate Raven firmware.

 

[Yuri Polyarush]

Thank you, Phil. I’m leaving it for much more than 10 minutes and nothing happens.

 

[Simon_G]

Thank you, Phil. I’m leaving it for much more than 10 minutes and nothing happens.

I would check if your getting vision out via HDMI if you can,
I think I remember reading once someone had contact issues between the brain and the monitor after an update, so maybe power down and remove and give contacts a bit of a blow?

The fact that you are getting something is good news to me over a complete blank screen.
I have not updated my firmware for a bit now, so not super sure myself.