How to reset a samsung DVR-B74301 without a remote?

Question edited for a lot more clarity.
Question moved to Samsung Home Security.

Swap the camera with no feed for one that does. If that location works, you know the camera is faulty. If the known working camera doesn't work, you know it is the wiring of the power supply to that location.

Samsung SDR-B74301 Quick Start Manual

ManualsLib https://www.manualslib.com > ... > SDR-B74301

View and Download Samsung SDR-B74301 quick start manual online. SAMSUNG ALL-IN-ONE SECURITY SYSTEM. SDR-B74301 security system pdf manual.

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Try this

How to COMPLETELY reset the SAMSUNG SDR-5100N when you`ve forgotten the password and it isn`t the default:
1) Make sure you are just seeing screens on the monitor
2) Push the [DVR] button on the remote so you will send the right commands
3) Enter the following seven key sequence in your remote control [FREEZE] [ALARM] [FREEZE] [ALARM] [FREEZE] [MENU] [ENTER]
4) A menu will pop up asking if you wish to do a factory reset your DVR (you do)
5) You will get a message that says "wait until your system turns off"
6) You will be asked to disconnect the power cable. You should do this for 10 seconds. When your system comes back on you can enter the default login of admin and 4321.

Samsung customer support is superb. You can call 1-877-213-1222 and choose option 2. It won`t list DVR`s starting with "SDR" as ones that can get support on that line, but it is indeed the right place. Hopefully now I`ve saved you 30 min on hold though.

Read more: How do I reset admin password on my Samsung sdr-5100N? - I forgot my admin password for my Samsung sdr-5100N so I need to reset my whole system./ OK OK ::

Ask Me Fast at https://www.askmefast.com/How_do_I_reset_admin_password_on_my_Samsung_sdr5100N-qna7634189.html#q4934265

videos as well

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk03rhdW5Gx06g_ITz0cnrtrVhrM5YA%3A1613348627233&ei=E78pYO7eDezp_QbyybLgDw&q=samsung+sdr-5100n+forgot+password

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Find a little pin hole or tiny button on back says reset hold it 5 Secs

take settings then select factory reset

Hello Nasir,
Password Reset Instructions
First, make sure that the unit is turned off.
Then press and hold any button on the included infrared remote control. While holding the button on the remote, power on the unit.
You should hear a single beep followed by a double beep. Samsung Security DVR Default Password.
For nearly all Samsung Security DVRs, the default password is 4321. If it hasn't been changed since setup, then you can just use that to access the DVR. The default password is included in the reset procedures.
https://youtu.be/RSwb7aaPIY8

Samsung Security DVR Reset Procedure #3

• Turn the device Off. Wait 2 minutes. ...
• The unit should power on. Once it does, you can release power.
• Use the volume UP and Down buttons to select "Wipe/Factory Reset" from the recovery menu.
• Activate the reset using the HOME button.

Samsung Security DVR Google Search

If you have forgotten your admin password on a Samsung Security DVR, most experts would suggest that you have to contact Samsung and/or send it back to Samsung to have the administrator password reset. While this is true in some cases, it is not always necessary.
Many Samsung Security DVRs have a built-in reset that will allow you to wipe the settings of the device and reset the configuration, including the administrator password. Note that if you perform one of these resets, all settings will be erased and you will have to setup the DVR again. So you should only do this as a last resort - but to reset an admin password, the last resort is the only option.
Reset Procedures for Samsung Security DVRs
There is more than one reset procedure for Samsung Security DVRs, depending on the series and model. But in total, this only amounts to a handful. Since one reset can apply to several different models, I'll provide the resets here so you can try them on yours - I won't associate any one reset with a single model because a complete list of which reset works with what model Security DVR simply doesn't exist. Some of these won't make sense based on the buttons available on your unit or your remote. In those cases, just skip that reset procedure.
If you can perform a reset (in other words, if the instructions match what you have available on your Samsung Security DVR and/or Samsung Security DVR Remote), try it, and let us know in the comments if it works and on what model. If you tell us which model Samsung Security DVR you have, along with your results of each reset procedure, we can compile a complete list of reset procedures by model so that it will be easier for those seeking this information in the future to reset their Samsung Security DVR. Also, if you have a reset that you have used and you know works, let us know and we will add it here. I will update the list of Samsung Security DVR resets/recoveries as I encounter them.
So if one of these doesn't work for you, you may want to check back occasionally. In fact, if you leave your model number in the comments and any specifics about your problem, I'll try to get that specific reset for you. For any of these comments, just use the comment section at the bottom of this page - it is checked regularly.
Samsung Security DVR Default Password
For nearly all Samsung Security DVRs, the default password is 4321. If it hasn't been changed since setup, then you can just use that to access the DVR. The default password is included in the reset procedures for completeness. If you have changed your password or access code for your Samsung Security DVR since it was setup, or if you changed it during the initial setup, use that password in place of the default password. The password will be the latest password that was set on the DVR. If no password has ever been set, then it will be the default.
Steps to Reset your Samsung Security DVR
Samsung Security DVR Reset Procedure #1
Reset the unit to factory by pressing both [MODE] and [PTZ] button for 5 seconds
Then enter the 4321.
Samsung Security DVR Reset Procedure #2
Reset the unit to factory by pressing both [MODE] and [CH2] button for 5 seconds
Then enter the 4321.
Samsung Security DVR Reset Procedure #3
This reset will work on Android based DVRs only. All steps are performed on the device itself.
Turn the device Off
Wait 2 minutes
Press and hold the following buttons
POWER,
HOME
VOLUME UP
The unit should power on. Once it does, you can release power.
Use the volume UP and Down buttons to select "Wipe/Factory Reset" from the recovery menu.
Activate the reset using the HOME button.
When the DVR goes through it's setup again, it will be at factory defaults. The password will be 4321.
Samsung Security DVR Reset Procedure #4
This reset will work on SDR models. It may also work on other models.
With just the cameras showing, press the following in quick succession using the remote:
Freeze
Alarm
Freeze
Alarm
Freeze
Menu
Enter
Make sure you press them quickly, one after the other. If it doesn't work the first time, try doing it several times. It can take many tries to get the timing right. If/when it works, you should get a screen that gives you the option to reset.
Samsung Security DVR Reset Procedure #5
This reset will work on SDR models where procedure #4 failed. It may also work on other models.
Press the DVR Button to place the system in DVR Mode
Press:
Freeze
View
Return
As with Procedure #4, you may need to press Freeze, View, and Return in in quick succession a few times to get it to work. The timing can be tricky.
Samsung Security Reset Procedure #6
Courtesy Sergio Ayala
To factory reset the SDR-B74301
Reboot the DVR
Once the DVR has rebooted, enter the following sequence on the remote:
UP, RIGHT, 5, 3, 3
You will be prompted to do a factory reset. Confirm
This has been confirmed by several people. Thank you, Sergio! If this works for you, please thank him in the comments below.
These reset procedures cover many Samsung Security DVRs, but not all.
CCTV Networking Technical Support

Samsung Security DVR Default Password

For nearly all Samsung Security DVRs, the default password is 4321. If it hasn't been changed since setup, then you can just use that to access the DVR. The default password is included in the reset procedures for completeness. If you have changed your password or access code for your Samsung Security DVR since it was setup, or if you changed it during the initial setup, use that password in place of the default password. The password will be the latest password that was set on the DVR. If no password has ever been set, then it will be the default.

Steps to Reset your Samsung Security DVR

Samsung Security DVR Reset Procedure #1

1. Reset the unit to factory by pressing both [MODE] and [PTZ] button for 5 seconds
2. Then enter the 4321.

Samsung Security DVR Reset Procedure #2

1. Reset the unit to factory by pressing both [MODE] and [CH2] button for 5 seconds
2. Then enter the 4321.

Samsung Security DVR Reset Procedure #3 This reset will work on Android based DVRs only. All steps are performed on the device itself.

1. Turn the device Off
   Wait 2 minutes
   Press and hold the following buttons
   • POWER,
   • HOME
   • VOLUME UP
2. The unit should power on. Once it does, you can release power.
3. Use the volume UP and Down buttons to select "Wipe/Factory Reset" from the recovery menu.
4. Activate the reset using the HOME button.
   When the DVR goes through it's setup again, it will be at factory defaults. The password will be 4321.

Samsung Security DVR Reset Procedure #4 This reset will work on SDR models. It may also work on other models.

1. With just the cameras showing, press the following in quick succession using the remote:
   • Freeze
   • Alarm
   • Freeze
   • Alarm
   • Freeze
   • Menu
   • Enter
2. Make sure you press them quickly, one after the other. If it doesn't work the first time, try doing it several times. It can take many tries to get the timing right. If/when it works, you should get a screen that gives you the option to reset.

Samsung Security DVR Reset Procedure #5 This reset will work on SDR models where procedure #4 failed. It may also work on other models.

1. Press the DVR Button to place the system in DVR Mode
2. Press:
   • Freeze
   • View
   • Return

As with Procedure #4, you may need to press Freeze, View, and Return in in quick succession a few times to get it to work. The timing can be tricky.

Samsung Security Reset Procedure #6 Courtesy Sergio Ayala
To factory reset the SDR-B74301

1. Reboot the DVR
2. Once the DVR has rebooted, enter the following sequence on the remote:
3. UP, RIGHT, 5, 3, 3
4. You will be prompted to do a factory reset. Confirm

This has been confirmed by several people. Thank you, Sergio! If this works for you, please thank him in the comments below.
CCTV Networking Technical Support

you need to do on the dvr .remolt settings you cant do needs to be done by the dvr