You need to find the correct firmware for your camera and apply it via the
tftp updater (if it works with that camera, easy enough to try though), as there is no longer a web GUI that can do that.
The closest match I can see on public view is on the Hikvision US site, the first section here :
http://overseas.hikvision.com/us/download_89_p3.html
It's an I5 as opposed to the I8, but I doubt the EXIR IR is going to require different firmware.
The Hikvision overseas site has firmware for a similar camera, but not quite the same.
http://overseas.hikvision.com/en/download_89.html
What recollection do you have about the original firmware version, and the region of the camera?
There is a copy of the tftp updater, and usage instructions, in the download link on the first post here (not the firmware, just the
tools) :
https://www.ipcamtalk.com/showthrea...are-Downgrader-5-3-0-Chinese-to-5-2-5-English
Hikvision no longer publish the tftp updater, though the 'batch updater' should provide similar functionality :
http://www.hikvisioneurope.com/port...Software Tool Package/16 Batch Config Tool/
I'm not sure though if it would work with a camera in 'min-system mode'.