I write to you because I have a problem with a DVR that I installed.
Sorry for my bad english.
Previously the client had a system with 4 generic cameras working correctly from a kit.
I only changed the cameras and the DVR leaving the armed cable that they already had in place. (cable is without baluns)
The DVR is a DS-7208HQHI-F1
The problem is: randomly shows a sign with the title Attention and with the message "The channel does not exist" and the OK button. He does it several times a day.
In addition, the live view is changed to a single camera, usually to channel 8. That is, we are seeing 2x2 cameras from 1 to 4, and suddenly it is only passed to channel 8 in full screen. And since the DVR has only 4 cameras connected, there is NO VIDEO in full screen.
I took it to the warranty and I left the customer a DS 7104HGHI. Result: in the guarantee the DVR says that it works perfect, and the 7104 the client does not present that problem.
Confused with this episode, I left the client a new DS-7208HQHI-K1 but WHEN CONNECTING IT PRESENTS THE SAME PROBLEM.
Can it be the old cable that is causing this inconvenience?
Thank you for reading.
I attach an image of the message that is shown every time.