I have a 16 channel Revo DVR and I need to reset the password so I can get to the set up page. My alarm will not stop

Question edited for clarity. Delete surplus words and fix the rest.

From the manual on Page 24

7. Forget password Solutions: Method 1: Please use password resetting email to get password. Method 2: Please contact technical engineer to reset password.

Or just buy another one

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Or ask them direct

Sannce Home - DVR User Manual.pdf

SANNCE https://support.sannce.com > en-us > articles > 900000...
May 12, 2021 - Sannce Home - DVR User Manual.pdf. Support Team. 3 years ago; Updated. Follow. Apply to: DN81BG ...

Possible procedure for another model.

https://www.manualslib.com/manual/757069/Signet-Qv-3020.html?page=15#manual

Quoting: "Chapter 5: DVR Setup -
5.15 Video Mode
This option enables you to select between PAL and NTSC video formats.
This unit comes packaged with PAL format cameras for use in your region; as such
you should not change this setting.
Chapter 5: DVR Setup -
5.16 Factory Reset
Press the [ SEL] button to restore the unit to default, the DVR will reboot and all
settings (including the password) will be restored to the factory default settings.
Caution: There is no confirmation dialog box after pressing the [ SEL] button!
If you have forgotten your password:
And the unit is not recording; keep the system on the main screen, and then press
the [Pause] button ten (10) times in succession, the DVR will then reboot with default
settings. Note: The default password is the [CH1] button six (6) times.
If the DVR is recording, you will need to disconnect the HDD to force the machine
to stop recording prior to resetting the machine to default. "

If you stuck in CCTV DVR Password Reset process. just visit
CCTV & Networking Technical Support Channel on youtube.
Here is the link:-
CCTV Networking Technical Support

Open up the password browser and enter...519070 that's the Default. I have years of experience with the night-owl system.
INSKIP

Hello, There are two things you can try, the default password for the system should be 000000. If that is not the password if you go into the System Menu under the "General" tab there will be an option that says Factory Defaults, this will reset the settings to the default and should remove any password that is in place, but be warned that this will possibly wipe the dvr.

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Mikw