DS-7616NI-K2/16P bricked

[bpaproch]

Hello All!
I have DS-7616NI-K2/16P but it is bricked.
I have been trying to update firmware by serial/TFTP to different versions old and new but nothing has changed. but I'm stucked because sth is wrong I believe at Bootloader level.
I have permanent message:
"Verifying RSA ... Bad Data RSA verify
ERROR: can't get kernel image!"
Can you take a look into log and advice what to do?
Thanks a lot!

U-Boot 2010.06-svn20427 (Mar 09 2018 - 16:41:25)[V1.4.5]


Hit ctrl+u to stop autoboot:  0

Mounting yaffs2 mount point/partnum: nand/0

Configures yaffs mount nand success!

Copy /nand/uImage to 0x42000000...      [DONE]

timeout for link [4999]!

MAC:   F8-4D-FC-E7-F2-B7

|RCV UDP pack timeout| TFTP server not found

## Booting kernel from Legacy Image at 42000000 ...

Verifying RSA ... Bad Data RSA verify

ERROR: can't get kernel image!

Mounting yaffs2 mount point/partnum: nand1/1

Delete part:flash_sys0 nand/version.bin

Configures yaffs mount nand1 success!

Copy /nand1/uImage to 0x42000000...     [DONE]

## Booting kernel from Legacy Image at 42000000 ...

Verifying RSA ... Bad Data RSA verify

ERROR: can't get kernel image!


This program will upgrade software.

***

    ATTENTION!! PLEASE READ THIS NOTICE CAREFULLY!     *
    Don't reset machine,or anything that interrupt it. *
    The upgrade process must finish in 10 minutes!     *
    If this program fails,machine might be unusable,   *
    and you will need to reflash again.                *
    If you find this too risky,power off machine now.  *

***


Now press [u/U] key to upgrade software:

 

[alastairstevenson]

Can you take a look into log and advice what to do?

The log after the firmware upgrade attempt would be useful.
And a link to the firmware that you used for that.
The log you've shown just shows that both main and backup uImage data is corrupt.

 

[bpaproch]

I have been trying with most of FW's from:

https://www.hikvisioneurope.com/eu/portal/?dir=portal/Technical

Materials/02%20 NVR/00%20 Product Firmware/05 K-series/K2 K4 K8
Thanks a lot for helping

 

[alastairstevenson]

OK, that's much clearer information about what you are trying to do.
The update process completes normally, the firmware is valid for the device.

Bytes transferred = 40631160 (26bfb78 hex)

That's quite small for K2 firmware - what was the firmware version that you used for the update attempt, possibly an old 3.x version? (link?)

I'm wondering if you are trying to update with much older firmware than has already been installed, and the old firmware is failing the updated runtime validation checks of the newer upgrade routine that is still in place. Though that does not seem likely, even though both main and backup partition data is rejected.

Or maybe there is a hardware problem with the flash memory corrupting.

 

[bpaproch]

As I mentioned, I tried to upload different versions of the software, and the old ones 3.4.xxx and the new ones 4.3x up to 4.71.
The result is always the same:
Verifying RSA ... Bad Data RSA verify
ERROR: can't get kernel image!

Memory under the kernel tested mtestall without problems.