Dahua Nvr Bricked

[majeb]

I made yesterday a Update of the nvr but now looped in the bootmode again again again.



Please help
I attaced a picture of putty

 

[K175un3]

Hello majeb, could we ask where you purchased it from please? As this may be useful, as there's Dahua products that are worldwide and also hacked Chinese versions as well.

 

[majeb]

This are original dahua device I buyed IT from a supplaier in germany

 

[user8963]

It seems that you have an uart adapter

Dahua IPC EASY unbricking / recovery over TFTP

A successor of Dahua IPC unbricking / recovery over serial UART and TFTP I recommend you to read through the above thread first. If your camera still has a working bootloader (assume it does) then you can flash it easily, because: The camera tries to download a file called...

ipcamtalk.com

Shouldnt be hard for you

 

[majeb]

Yes I have but IT doesent work becouse the Box restart again q

 

[user8963]

Have you already tried to flash via TFTP? If you dont, FIRST try to flash an image via TFTP. According to your screenshot, it should work. Start from scratch. If you can interrupt the boot, it should not restart.

You cant interrupt the startup ? Then you may have flashed the bootloader instead of the image. If you have, your device is bricked and needs a reflash of the bootloader, which is nearly impossible without a programmer.

Is this device from EPS or German Protect ? There are not many reseller of dahua in germany which sells B2C. Only B2B.

 

[Kendive]

I made yesterday a Update of the nvr but now looped in the bootmode again again again.



Please help
I attaced a picture of putty

Wow that sucks... I have not up dated my NVR since I bought it from Andy for this very reason. Works great why mess with it.

 

[majeb]

I can not upload the becouse I have this Foul

 

[user8963]

For all:

It seems that the bootloader was flashed on this device (because uboot shows june 2019).
It is impossible to flash an image over tftpd with the common commands (run dr,... etc), it just wont transmit. Older images (before 2019) can be transmitted, but get an checksum failed and do not write. So I think this is a downgrade protection.

According to boot output, it seems that the device boots up good, but has a reboot after 30s. So it hangs in a reboot loop.

 

[MC1987]

just try "bootd" command