Reset Dahua nvr 4208

[valentindusollier]

If it were me, I'd definitely place a jumper on those two contacts, then apply power to the NVR while a video screen is attached. Do be certain to allow several minutes for it to reset to default firmware, at least 3 to 5 minutes. After that, remove power, remove the jumper, and re-apply power.

Unfortunately it doesn't work on my NVR 4208.. Do you have any clue ? There is yellow battery that I can't remove, do you think the problem comes from there ?

 

[Mark_M]

there is no j1 to reset, any solution please !! model 1b04h-i


View attachment 117346

I'm looking down the rabbit hole of resetting these low-spec NVRs... sorry for replying to a VERY old thread.

Trends I'm finding:
Either a two pin jumper labelled 'J1', or there's pads on the NVR for a momentary button switch.

This one has the 4 pads for a switch, with two more in the middle that might also be wired in parallel.
I'm guessing this might be the reset button location.