I can find nothing in this forum, the firmware webpage, or the IP2M-841 firmware announcement email that says you cannot or should not downgrade IP2M-841B firmware dated 2019-8-3 to firmware dated 2017-06-29. Peter89 and nyclouie said in this thread that the the downgrade works. Peter89 said it again yesterday in a post in this thread. @Revo2Maxx, please cite some specific references to support your statement that it can't be done, or will brick.
I suggest you send an email to [email protected] with James.S in the email title so he will get it. James.S acknowledged the PC-NVR problem two months ago in this thread. If you wish, ask James.S to send you the firmware you need.
Another thing you could try is SmartPSS which has PV-NVR 3.0, a newer version. Perhaps it will work. See
https://amcrest.com/forum/amcrest-surve ... 12605.html
Release old PC-NVR storage if possible. After you uninstall Surveillance Pro and PC-NVR, do a PC restart to make sure PC-NVR is not still running. Then install SmartPSS and PC-NVR.
JonS wrote: ↑Sat Nov 02, 2019 7:05 am I have the same problem with IP2M-841B - PC-NVR was working fine with out-of-the-box firmware. I upgraded to the latest firmware from the AMCREST website, exported settings, reset to factory defaults, imported settings I had previously exported. PC-NVR no longer worked. The solution in this thread of going back to the older firmware no longer is available because the older firmware isn't there anymore.
I have re-installed Amcrest Surveillance Pro/PC-NVR from scratch but PC-NVR still has no recordings. I can add the camera to PC-NVR and I see a valid thumbnail snapshot in the PC-NVR Remote Device screen. The recording plan for PC-NVR and for the camera both show Regular and Motion Detection enabled all day and every day. I have released and re-allocated PC-NVR disk space on multiple drives but that didn't help.
The camera event log shows that motion detection events are being triggered, but there is no saved video anywhere. I am able to make local recordings but they stop recording after about 30 minutes, so that isn't a reasonable alternative.
The original firmware that came with the camera was something with 520 in the name, and I think from 2017. Is it available anywhere? The current version is 2.420.AC00.18.R 2019-8-3, and since this thread hasn't been updated for two months, I'd prefer just to go back to the old firmware.