I have had a DVR8-4400 system with 7 SWPRO-H850 cameras for a couple of years. I have noticed recently that if I try and play back several cameras at once it may display 2, but the other 2 would be blank. At first I thought it was not recording but when I select the 2 that were blank they play ok.
So I am happy all cameras are recording, I just seem to be limited as to however many I can view at once. this obviously makes reviewing footage more time consuming.
I am playing back directly to my TV, not via a PC.
Just realised, title of this is wrong. Should read ' ...play back 2 at the same time' (not consecutively)