32 Channel NVR with 16 POE not working

[D!ngo]

I have an LTS LTN8932-P16, which is essentially a Hikvision with 16 built-in POE. I had 16 cameras connected to all the POE ports.

Last year, the built-in POE stopped working, so I got a 48-channel switch and transferred all 16 cameras to it, and plugged the uplink from the switch to the NVR. The NVR automatically assigned them to channels 17 to 32 with new IPs. The original 1 to 16 IP information is still there.

Now I wanted to add more cameras to it, but the NVR says it's full. I tried to delete the non-working POE, but it says "does not support delete operation".

I tried erasing the IP from each channel, but couldn't.

Is there a way to delete the non-working channels or remove the POE ports from the NVR? Any workaround to add more cameras? It still thinks there are cameras connected to its POEs.

 

[alastairstevenson]

Now I wanted to add more cameras to it, but the NVR says it's full. I tried to delete the non-working POE, but it says "does not support delete operation".

NVR PoE channels can't be added to or removed, but they can be re-assigned to use a LAN-connected camera instead of one connected to the on-NVR PoE port.
Depending on the firmware version, this can be done by either a menu choice in the NVR web GUI, or by changing the channel mode to Manual instead of Plug&Play and specifying the LAN IP address of the camera.

This Hikvision NVR has all its PoE ports assigned to LAN-connected cameras on an external PoE switch via the enable / disable tickbox :

 

[alastairstevenson]

Last year, the built-in POE stopped working

Just a thought - did you check if the power supply is still providing the 48v that the PoE circuitry needs?
If the 48v is missing, that won't stop the rest of the NVR working.

Also - the PoE channels each have several 'transient protection devices' designed to absorb or self-sacrifice if / when the cabling presents an overvoltage to the port. This would only affect individual ports if it occurs.
The 48v supply rail also has over-voltage protection, which if it goes short, as designed, would take out all PoE channels.

Either way, an electronics-savvy person should be able to explore that possibility.

However - you've already established the workaround, so not that relevant, but posted in case someone else is in a similar position.