Feelworld FW759 Monitor Display Issue

My new field monitor a Feelworld FW759 Monitor has a rather major display fault.

It worked when I first got it, two weeks later it started doing this, then it started working again, and now back to not working. Not very reliable.

I bought to be used as a quick field monitor for clients to view footage from a live feed from our drones. Not sure whether it is fit for purpose due to how unreliable it is.

Atomos Ninja Blade used to show that the HDMI signal is a good clean signal.

Dodgy Ebayer – duoduobox

This purchase from Ebay user duoduobox who used stalling tactics telling me that he sent another one as a replacement and that it was held up by customs. Eventually, over 3 months went by and I can no longer comment or message them about the item as it has expired. all other communications have been ignored. Avoid this user at all costs!

Atomos Ninja Blade – http://amzn.to/2oWM0HR
Feelworld FW759 – http://amzn.to/2pNp3fb