Fixing a DVR or NVR that automatically restarts is a common problem.


In the context of NVR or DVR of your CCTV security system, a network video recorder (NVR) or digital video recorder (DVR) that turns off or reboots on its own is a huge security red flag. Is this specific problem experienced by a large number of people: My DVR does a manual restart on its own? My network video recorder constantly restarts itself.

My network video recorder keeps powering itself off and then back on again by itself. My NVR turns off by itself sometimes. How do you troubleshoot and repair an NRV or DVR that restarts itself for no apparent reason?

Regrettably, a recorder (DVR or NVR) in a CCTV system that turns off by itself is a typical problem that needs prompt repair.

In this piece, we will discuss the factors that may lead to an NVR or DVR performing an unexpected restart or power cycle on its own. In addition to this, we will provide recommendations and guidance on how the DVR and NVR restarting problems may be resolved.

Rebooting either my DVR or my NVR. How can we make it right?

In this section, we will go over all of the possible causes of an NVR orĀ  DVR turning off by itself, as well as the solutions to each problem. Follow each step in sequence until you have resolved the problem of your recorder restarting itself.

Bad or degraded hard drive

This is among the most frequent causes of a digital video recorder (DVR) or network video recorder (NVR) to unexpectedly shut down or reboot. If the hard disc has been corrupted or has been physically destroyed, several different brands of DVRs and NVRs will automatically reboot.

If the hard drive is broken, it will consume more power than necessary from the motherboard, which will force the recorder as a whole to turn off by itself.

There is a small chance that the hard disk may cause the board to short circuit, which will permanently harm the recorder. Take note: if you want your NVR or DVR to work properly, you can’t use desktop hard drives; instead, you must utilize a surveillance hard drive.

You may check to see if there is a problem with the hard drive by first turning off the device and then opening the unit’s lid. Find the hard disc and open it up (s). The data cable and the power cable are the two cables that connect the hard disk to the motherboard. One of the cables carries data, while the other carries power.

Remove both of their connections. Activate the recorder, and then check to see whether the apparatus is starting up once again. A great number of recorders have problems with powering off at regular intervals of between two and five minutes and, in some instances, thirty minutes. In either case, you need to wait sometime before determining if the problem has been resolved.


If the recorder does not randomly shut down or reboot, then the problem may be solved as follows: the hard disc was faulty and was preventing the DVR or NVR from functioning properly. You will need a new hard disc to replace the one that is now malfunctioning.

Obtain a hard disc that is specifically rated for use in CCTV surveillance systems. Standard computer hard drives have a shorter lifespan (one to two years), on average, compared to the CCTV-rated ones (5-10 years).

If your recorder has more than one hard drive installed, you will need to disconnect each one in turn until you determine which one is causing the recorder to randomly restart. If you have more than one hard drive installed, your recorder will randomly restart.

When a hard drive is failing, it may sometimes create a noise that sounds strange and odd, like scraping (listen carefully to the noises coming from your hard drive).

The fan has stopped working.

If this is the situation, the fan that is attached to the motherboard and is responsible for cooling the CPU is broken, jammed, scorched, or otherwise damaged. If the fan is not turning, the central processing unit (CPU) may overheat, which will force the DVR or NVR to automatically restart or shut down. After that, it will come back up, remain so for another half an hour, and then begin to reboot once again (same pattern).

The machine should be left running while you remove the lid from the recorder to check on the functionality of the fan. Take a gander at the ventilator. If it is not functioning, then it is either damaged or broken in some way.

If this is the situation, you will notice that the circuit board has a charred smell and is quite hot to the touch. There is a remote possibility that the dirt and dust might prevent the fan blades from turning.


You really have to switch out the fan as quickly as you can. A malfunctioning fan might result in the motherboard catching fire or being permanently damaged, in which case the whole machine will need to be replaced.

We would advise you to power down the computer and hold off on replacing the fan until you’ve got a new one available. Fans may be purchased on Amazon, or if the device is still covered by its warranty, you can buy one from the dealer or reseller that sold it to you. Be careful that you get the same kind and size of each item.

Is there an issue with the power adaptor?

In this particular instance, the power supply that is used to power the device does not provide a sufficient amount of electricity juice. The DVR or NVR is having trouble and will randomly restart itself. After a few seasons of usage, the integrity of many low-cost power adapters will be damaged.

Let’s assume that they are meant to supply 2 amps again for the recorder, but after a few months, they are only producing 1.5 amps instead. This is not what was intended. The recorder will unexpectedly turn off or reset itself if there is an insufficient supply of electrical juice.


The remedy is to make sure that the device is receiving the appropriate amount of power by using a different charging adapter or power cable. If you find that you need to renew it, be sure to choose one that comes highly recommended by the company that made it.

Check that the voltage is at the specified level and that the amps are either the same or greater than before. This is of the utmost significance. If the device calls for a voltage of 12 VDC, you have to ensure that you provide it with just that.

However, if the machine requires a current of 2A, you may acquire a power adapter that delivers 3A or 5A, and the machine will not be harmed by the current even if it is more than what it requires. The recorder will consume as much electricity as it requires from the power supply.

A malfunctioning camera is the source of the short circuit.

This is the situation with many different CCTV HD analog systems, particularly those that make use of coaxial cable. It’s possible that one of the analog HD cameras is broken or that its cable has been cut, either of which can enable the DVR to randomly restart or turn off. We have observed this problem manifest itself most often in low-cost HD CCTV cameras or in cameras that have been compromised by water.

In order to determine which camera is the source of the issue, you will need to detach each camera individually, then watch to see whether the recorder restarts after each disconnection. Carry on with the approach until you get a hit and discover the location of the malfunctioning camera. Either do the connection procedure one more time or completely purchase a new camera as the answer to the problem.

Another important component to think about in this context is the power box, which supplies electricity to the cameras. Sometimes the power box may accidentally generate a short circuit in the connection, which will result in the DVR or NVR randomly powering off. Check the power box that you have. Check that the connections are secure and that there aren’t any loose wires that might cause a short circuit.

IP disagreements throughout the network.

If the DVR or NVR shares an IP address with another gadget on the local network, then it will restart itself automatically. In most cases, the DVR or NVR and the other gadget will randomly reboot simultaneously.

Let’s assume the IP address of your NVR or NVR is, and on the same local network, you also have a scanner (or an IP camera) with the same IP address. What results from this scenario are there? They are going to exclude each other from the network. This “kicking off” is what you observe as an unexpected restart or shutdown of the system.

You need to do a scan over all the devices that are connected to your local area network and check to see that each one has its own distinct IP address. Failing to do so might lead to an IP conflict.

If you encounter the same IP address more than once, you should replace one of them with an address that is not being used. Another piece of advice is that before you assign any IP address to your gadgets, you should first ping that IP address using your desktop or laptop computer to ensure that it is in fact usable.

Read related articles here also: General Tech/Our Blog

Auto-reboot settings

Many digital video recorders and network video recorders feature options for “rebooting.” The DVR or NVR might well be programmed to automatically restart in order to facilitate maintenance procedures.

This would be done to prevent the program from being frozen and to maintain the system’s current state. For instance, the NVR or DVR might well be programmed to automatically restart itself every Monday at 2 AM.

Check the configuration once again to ensure that the automatic restarting schedule is turned on. This functionality is not supported by all recorders. Nevertheless, some of them, like the Dahua brand, have an auto-reboot mechanism built in. (You may normally find these options under the part of any DVR or NVR configuration that is labeled Maintenance.)


Watch this video also for more insight on how to fix DVR or NVR.

There are issues with the recorder’s hardware.

In this particular instance, there is not much that can be done or diagnosed. You could have tried all of the tips that were provided above, but your recorder could still be restarting itself. There is a possibility that the issue is associated with the hardware; for example, the DVR or NVR may be broken, which would explain why it turns off by itself (this is common with cheap no-name recorders).

We strongly suggest getting in touch with either the manufacturer or the reseller and inquiring about their recommendations. Alternately, you might modernize your surveillance CCTV system.

In the event that you have any additional recommendations, please type them into the comment box.

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