Question Monitor went all green for some reason?

[Helimann]

So I used this as my seocnd monitor and one day it just went green but not when it shows picture its green without any signal source what so ever preety confused by that.

Pic in link below

https://imagizer.imageshack.com/img924/6944/j7HJ9E.jpg

 

[Dj0gany]

Might be dead.
Have you tried any other cables or anything?

 

[Helimann]

After long time I left it on for few hours and forgot about it on green screen and now its normal but cant seem to get any output on it and I did tried other cable