Reset DVR password to Factory default

[dunix 0]

Hello,

I have forgotten my router password because I have not used it for a long time.

I tried to get in through the passwords I use, but I did not succeed.

I searched the internet for how to restart Iber to factory settings and found one way by removing the battery. I tried this way but I did not succeed. I read something about the jumpers, but I did not find it