Did you solve the update problem? I have the same TV model as you and I have tried everything until I found your publication, but you know, I have realized that in my case my TV has update 2141, and version 2501 is available on the Samsung page, so download the largest file which contains three versions of software T-KTSU2AKUC_T-KSU2EAKUC_T-NKLAKUC, check the two different versions, there is an info file in the image folder that specifies the version of the update it says
[Main information]
upgrade type: USB
model string: T-NKLAKUC
major version: 2501
minor version: 1
build date: 2023-08-19
release name: SWU-OU_T-NKLAKUC-02501-2023-08-19-Release
firm code: SWU-OU_T-NKLAKUC_02501_2023-08-19
firm version: 02501.2023-08-19
used key type: REL key of NikeL decrypted aes key/REL key of NikeL private rsa key
tool version: 1.7
partitions: 123456789101213141518192223
md5sum:5f25b76a090d3546c81463083b676b34
but the surprise is that when you check your update folder and open the info file, a lower version appears than what it supposedly should be, it is 2130
[Main information]
upgrade type: USB
model string: T-KSU2EAKUC
major version: 2130
minor version: 8
build date: 2023-04-14
release name: SWU-OU_T-KSU2EAKUC-02130-2023-04-14-Release
firm code: SWU-OU_T-KSU2EAKUC_02130_2023-04-14
firm version: 02130.2023-04-14
used key type: KantSU2E rel key decrypted aes key/KantSU2E rel key private rsa key
tool version: 1.8
cipher suite: aes-256-cbc-sha512
partitions: 123456789101213141518192223
md5sum: 75310a4bdf2d3cc0166a9c6cc9f3584d
In my case it is for that reason that it does not update, Samsung has the wrong version on its download server.
