CCTV screen view suddenly turned green?

ferry

Can anyone help with why my screen that shows my CCTV cameras has suddenly turned green?
I initially thought a graphics card issue but its been fine for a couple years and the same screen is shared with my PC which displays fine so just an issue on the cctv input. 
Any ideas guys ? Or has it just caught a bit of Hulk syndrome..😄

Thanks as always for any help

cymruchris

What brand of cameras? What brand of recorder? Did you have phone access - and do you still have phone access via an app?

ferry

They are Technomate cameras running cabled from Annke dvr. No issues for last 2 years. Yes, I have the app on my phone and all looks fine on the app

Thanksn 

cymruchris

So if the monitor is showing a picture from your regular PC - but not the output from the recorder - and your cameras are still viewable via the app - then it must be the graphics output, which could be a cable issue (Have you tried unplugging and reseating both ends of the cable?) or an internal component failure. If you have a spare cable - can you plug it in to also rule that out? If the cable's fine, and seated properly - then it's likely time for a new network video recorder. Hopefully you've got the original activation passwords that you set for your existing cameras - so that when you connect a new NVR you can get them up and running again...

ferry

Many thanks, will check cables first