Qvis Cctv issues

[Sagz77]

Hi All, hoping you can help. Iv had 5 Qvis dome cameras installed about 7 years ago, connected to a Qvis Pioneer dvr.
Never had a problem but recently all 5 cameras suddenly overnight became grainy, can just about see at daytime but impossible at night, literally all come up as pitch black, only 1 camera when the lights are on has a bit of a view.
I have restarted the Dvr, formatted the hard disk, checked connections and unplugged/plugged the ethernet. Same story viewing on App and Monitor.
Considering all 5 have gone duff pretty much same time, could this be a Dvr issue or linked to it rather than the camera's? Day and night pics included below.

Thank you.

 

[Dan]

Hi @Sagz77

Do your QVIS cameras support IR LEDs for capturing a black & white image at night? Do you have any screenshots of what the night images looked like before?

At first glance, it looks like the IR LEDs of your dome cameras have failed because without them cameras that use IR would only achieve a very dark/black image at night.

If you go outside at night and look at the dome cameras can you see any red/pink glow from the IR LEDs inside the domes?