Flashing Checksum Err BU40n

[msadams]

I've read a lot of threads and guides and still having issues. First post, sorry if in wrong place.
I started here https://www.swedetrap.com/how-to-rip-4k ... ray-discs/ and bought same drive. From posts on this board it seems to be a popular one. I am using Windows 10 and have it plugged in to a usb-c port.

New slim drive: Archgon Premium Aluminum External USB 3.0 UHD 4K Blu-Ray Writer Super Drive for PC and Mac

mkv reports:
-------------------------------------
Drive Information
OS device name: H:
Manufacturer: HL-DT-ST
Product: BD-RE BU40N
Revision: 1.01
Serial number: MO1L3VD2215
Firmware date: 2119-10-16 10:32
Bus encryption flags: 1F

LibreDrive Information
Status: Possible (with patched firmware)
Drive platform: MT1959
Harware support: Yes
Firmware support: No
Firmware type: Original (patched version available)
Firmware version: 1.01
DVD all regions: Possible (with patched firmware)
BD raw data read: Possible (with patched firmware)
BD raw metadata read: Possible (with patched firmware)
Unrestricted read speed: Possible (with patched firmware)

No disc inserted
----------------------------------------------
Trying to flash with Downgrade Enabled Firmware V.2
I get:

Target HL-DT-STBD-RE BU40N 1.01
Current Version 1.01-01
New Version 1.00-A4

Hitting flash and it returns
CheckSum is mismatched.Drive will go to BOOT mode Please retry again

thanks for any help.

[d00zah]

From 1st post in Ultimate UHD Drives Flashing Guide Updated 2021

Recommended Firmware to flash for MakeMKV:
BU40N on any Firmware directly to > BU40N 1.03MK

Unlocked Flashers, Downgrade Enabled Firmware and MK Firmware:
has links to New! The all you need firmware pack & New! GUI SDF tool

[msadams]

I think I went down this path partially before and then stumbled.

I didn't find a direct match for: "BU40N 1.03MK"

I found two so far
1) HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin in the Mk-firmware-pack

2) HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 which is from the "All you need firmware pack"?

Do I use one of those?

Thanks for the help!

[Billycar11]

I think I went down this path partially before and then stumbled.

I didn't find a direct match for: "BU40N 1.03MK"

I found two so far
1) HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin in the Mk-firmware-pack

2) HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 which is from the "All you need firmware pack"?

Do I use one of those?

Thanks for the help!

HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 is 1.03MK

[msadams]

Thank-you that worked.

I was able to use MakeMKV now on an UHD disks. I also paid for the copy of MakeMKV.

Does anyone know if there is a ROM that is safe to flash to this drive to make it AnyDVD friendly as well?

[MartyMcNuts]

Thank-you that worked.

I was able to use MakeMKV now on an UHD disks. I also paid for the copy of MakeMKV.

Does anyone know if there is a ROM that is safe to flash to this drive to make it AnyDVD friendly as well?

No, there isn't one. Slim drives cannot be made "friendly" for AnyDVD usage.

[msadams]

Ok thanks! I can now rip mkv files for our NAS from our UHD disks so I am happy with that!

I really appreciate the help and the great software

[E-Gwen]

Hi,

I made a mistake.

I flash my BU40N Lg Drive directly to the 1.04 original firmware.

I need to flash it with the HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin firmware or with the HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin firmware.

I get the same message :
"ChekSum is mismatched.
Drive will go to boot mode
Please retry again."

I didn't manage to flash it with downgrade tool (Both with Friendly Firmware Pack and Downgrade Enabled Firmware V.2)

I didn't understand clearly if it is finally possible or not.

Can you please make me see the light ?

Cheers.

[Billycar11]

Use enc

[E-Gwen]

What does "enc" mean ?

[E-Gwen]

"enc" is for "encrypted", all right.

But what do I do ?

I have to use SDF tool ?

[E-Gwen]

Allright,

I follow the tutorial under "How to flash[...] and commands", at viewtopic.php?f=16&t=19634#p74718, recommanded here.

I copied the firmware to the c: root, open cmd in "execute" (not Powershell) and write :

"cd C:\Program Files (x86)\MakeMKV

makemkvcon64.exe f --all-yes -d E: rawflash enc -i C:\HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin"

where "E:" is MY path drive (be careful).

And it flashed !

Thank you very much, guys, and see you.

[MattyB]

I think I went down this path partially before and then stumbled.

I didn't find a direct match for: "BU40N 1.03MK"

I found two so far
1) HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin in the Mk-firmware-pack

2) HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 which is from the "All you need firmware pack"?

Do I use one of those?

Thanks for the help!

HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 is 1.03MK

Ive tried to flashing to both 1.00 and 1.03 and get the same error "Checksum is mismatched" is there an updated version of this tutorial? I cand find anything on youtube or online.

[d00zah]

Ive tried to flashing to both 1.00 and 1.03 and get the same error "Checksum is mismatched" is there an updated version of this tutorial? I cand find anything on youtube or online.

Are you perhaps starting from an encrypted FW & NOT using the 'enc' switch?

Paraphrased from above:

- Remove disc in optical drive, if any.

- Copy HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin to c:\

- Open 'Command Prompt" (not Powershell) and (assuming your drive letter is E:) execute:

cd C:\Program Files (x86)\MakeMKV

makemkvcon64.exe f --all-yes -d E: rawflash enc -i C:\HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin

[Billycar11]

I think I went down this path partially before and then stumbled.

I didn't find a direct match for: "BU40N 1.03MK"

I found two so far
1) HL-DT-ST-BD-RE_BU40N-1.04-NM00500-212005061142.bin in the Mk-firmware-pack

2) HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 which is from the "All you need firmware pack"?

Do I use one of those?

Thanks for the help!

HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934 is 1.03MK

Ive tried to flashing to both 1.00 and 1.03 and get the same error "Checksum is mismatched" is there an updated version of this tutorial? I cand find anything on youtube or online.

Updated guide linked below