Dahua DVR - HDCVI Locking up

T

Tondar

n3wb
Feb 26, 2025
5
0
Michigan
Hey all,

I have an older Dahua HDCVI DVR that I got in 2014. It ran great for the last 10 years but is now having problem after problem. The main CPU fan started making noise and right before I had the parts to replace it was the first time the DVR locked up. It just seemed to be offline but the fans were still on and the TV hooked to the HDMI port was showing a single camera feed but the mouse was frozen and it wouldn't respond. I had to turn off/on the power to get it back up and running. Since that time I have replaced all the fans cleaned out the dust and cleaned the contacts on the purple WD hard drive. (I'll have a separate post on the Noctua fans I installed... interesting observation). Now, it will run fine for a couple days to a week but then locks up. Some times it locks up with the buzzer on solid - this happened at 4 in the morning:angry:. Other times I don't even notice until I try to check the cameras on my phone or through PSS and there's no connection to the DVR, I go to the DVR and look at the TV connected to the HDMI port and there's nothing there like no signal to the TV and the DVR has to have the power cycled to get it back. At this point it's not a reliable system I just don't know how to find out what is happening.... any ideas/thoughts? Thank you for any help provided!!
 
1- try disconnecting it from the internet for 3-4 days

2- it’s 11 years old and cost $200 so not a huge surprise

3- have you replaced the power supply?

4- have you changed or added new cameras?
 
bigredfish said:
1- try disconnecting it from the internet for 3-4 days

2- it’s 11 years old and cost $200 so not a huge surprise

3- have you replaced the power supply?

4- have you changed or added new cameras?
Click to expand...
1 - I can try that... what's the thinking behind this?
2 - yeah it's old... if I buy a new one though I would likely go NVR and IP cameras so not a cheap path but will do it if I have to
3 - I have not replaced the power supply but I did replace the fan inside the power supply. It does not appear to be losing power from what I can tell as the fans never turn off?
4 - No change to cameras, all HDCVI cameras

Thx for your help
 
1- hacked

2-understood. I bit that bullet a few years ago myself. Had to beg the Treasury Dept. But she finally came around

3- fan draws little power compared to cams

4- check
 
bigredfish said:
1- hacked

2-understood. I bit that bullet a few years ago myself. Had to beg the Treasury Dept. But she finally came around

3- fan draws little power compared to cams

4- check
Click to expand...
1 - would executing a firmware update help here? wondering how to know if this has/is happening
2 - :)
3 - the cams are powered separately from the DVR
4 - not sure what to do here, I can review all the setting in the DVR? unplug the cameras and see if it still happens?
 
The cams are powered separately but the DVR itself draws more juice than just the fan. Power supply dying at 11 years would be the 2nd thing I check beyond being hacked and someone streaming the video and overtaxing the DVR bandwidth capabilities.

FW wont necessarily change the hack situation.

Are you port forwarding to see cameras remotely? Thats the #1 way they get hacked.

yes you could try removing a couple of cameras and see if it makes a difference, with it being analog and separate power supply, I kinda doubt it.
 
bigredfish said:
The cams are powered separately but the DVR itself draws more juice than just the fan. Power supply dying at 11 years would be the 2nd thing I check beyond being hacked and someone streaming the video and overtaxing the DVR bandwidth capabilities.

FW wont necessarily change the hack situation.

Are you port forwarding to see cameras remotely? Thats the #1 way they get hacked.

yes you could try removing a couple of cameras and see if it makes a difference, with it being analog and separate power supply, I kinda doubt it.
Click to expand...
Good advice on the power supply, how can I check if I'm being hacked? I am port forwarding for remote monitoring.
 
Unplug from the Interweb #1 and see if it has an effect

You can also look at the logs and see what they show happening around the time of the problem and check the "accounts" and see if there are any there you dont recognize.
 
Update:

I reviewed the logs and see nothing to suggest a hacking. That being said, I unplugged the ethernet cable from the DVR and it ran fine for 4 days. I started thinking maybe this was the answer but then i heard the buzzer go off, the DVR had shutdown. Interesting though, it seemed to restart and function again on its own. This happened again yesterday. The logs of these shutdowns are useless, they don't say anything. I see a S.M.A.R.T. info entry after the shutdowns that say everything is OK in the status fields. I guess I should try the power supply next.. any recommendations for replacing the supply? I see on Amazon a "Best Parts" power supply that is supposed to be compatible. Ebay has the exact Delta DPS-75VB B from various "direct from China" sources.
Thx again for the help!!
 
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