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I need you guys help. These is a cctv system, a dvr with 16 cameras. In the past 6 month, everything is fine. However, one camera had lost video since last Friday. But when I use my Iphone, I can see the image, the channel is good. But only this channel cannot display on the monitor which I connect to the dvr. I tried to change a new monitor, but it is the same. That channel has a big triangle with a "!". Who knows what is going on? Please help me. Thank you..

It's HD-TVI DVR. model #: LTD8316t-ft If the channel was hidden, the date and time were hidden too. But in the screen, date and time is showing.

I'm a new installer for security camera. Who can send me a sample contract form? My email is lnfs521@hotmail.com Thanks a lot.

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