What was the original firmware version and what firmware version was on the label?can you help me with my DS-2CD3132 that is in v4.0.8 state after firmware 5.4.0, what to do?
Is this a CN camera?
This first thing to try is the Hikvision tftp updater to apply the 'whoslooking 5.3.0 to 5.2.5 downgrader'
The instructions and the tftp updater and the firmware can all be found in the link in the first post here : Custom Firmware Downgrader 5.3.0 Chinese to 5.2.5 English
If that brings the camera back to life - good. Though it may have CN menus and need the 'mtd hack' to convert to EN.
If not - then maybe the camera has the 'anti-rollback' 'feature' in which case I have a tool which should help.
Good luck!