How to reset the pasword? i just forgot the password of my Ganz DR4N DVR.

https://www.manualslib.com/products/Ganz-Digimaster-Dr16h-Dvd-3559627.html
Try this link to download its manual. It will have the details you want.
If you wish to get some details; check the site linked here.
https://elektrotricks.blogspot.com/
https://electronicshelponline.blogspot.com/
faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Search the site by type in the Brand Name of your set, in its search bar at the right side column, and press enter. See it in Webview with mobile or by desktop. Mobile View has no search box.

Default user Admin
Default password 1234

You can add information to your question using the Comment menu selection.

try to find Cmos battery on the main board and remove it

HOW TO VIDEO

If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/
System reset procedure to many popular brand video recorders are given.

go on forgot password

if it is the HD must be set to GANZ if it is the 4-8-18 N try 1234.

You can reset the password. If you have another computer and a USB flash drive - see http://www.rmprepusb.com/tutorials/12---bootable-usb-drive-to-reset-windows-user-pasword

I have a H.264 Network DVR with ver. V2.00.R05 and I've forgotten the password can anyone help with resetting it...
Mikw

The manual says:
You cannot enter MENU by forgotten password.
- If you forget the password, you shall reset SHR-2160/2162/2080/2082 DVR to
the values set at the factory. Keep pressing both the "MODE" button and the
"PTZ" button on the left for 5 seconds, Keep pressing both the "MODE" button
and the "PTZ" button on the left for 5 seconds. The password default is "4321".