# Bricked Mainboard After Flashing Firmware? **URL:** \ **Category:** Sovol SV08 MAX\ **Created:** [July 5, 2026, 8:36pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185 "2026-07-05T20:36:42Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 5, 2026, 8:36pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/1 "2026-07-05T20:36:42Z")
Tried to mainline my Max. Got everything done ok until came time to flash the mainboard MCU. I believe I did NOT use the correct board parameters when creating the bin file. The flash succeeded but upon reboot got MCU error. LSUSB shows no STM32H750 and I have lost can0. And obviously klipper will not launch. Is there a way to perform an out-of-band mainboard firmware upgrade? Thanks in advance. ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [July 5, 2026, 9:55pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/2 "2026-07-05T21:55:39Z")
If your MCU flash didn’t break the bootloader then you should be able to edit the Sovol script at: home/sovol/printer\_data/build/mcu\_update\_fw.sh It can be found here: > If that won’t work you’ll need a STlink and flash [GitHub - Arksine/katapult: Configurable bootloader for Klipper · GitHub](https://github.com/Arksine/katapult) ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 6, 2026, 1:22am UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/3 "2026-07-06T01:22:05Z")
Thanks for this. There is no mcu\_klipper.bin in that folder, assume that is the lynchpin for this? Just a renamed klipper.bin file? I flashed an EMMC card back to the latest published image. Do you know where I can get the mcu\_klipper.bin firmware file for this? You are my hero if this works! Thanks! ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 6, 2026, 2:05am UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/4 "2026-07-06T02:05:49Z")
OK so you’re still my hero but that didn’t work: Get into bootloader … Flashing CAN UUID 0d1445047cdd on interface can0 ERROR:root:Flash Error Traceback (most recent call last): File “/home/sovol/printer\_data/build/flash\_can.py”, line 481, in run self.cansock.bind((intf,)) OSError: [Errno 19] No such device During handling of the above exception, another exception occurred: Traceback (most recent call last): File “/home/sovol/printer\_data/build/flash\_can.py”, line 661, in main await sock.run(intf, uuid, fpath, req\_only) File “/home/sovol/printer\_data/build/flash\_can.py”, line 483, in run raise FlashError(“Unable to bind socket to can0”) FlashError: Unable to bind socket to can0 ./printer\_data/build/mcu\_update\_fw.sh: line 28: kill: (31338) - No such process ls: cannot access ‘/dev/serial/by-id/\*’: No such file or directory Failed to detect bootloader id! Exiting… Think it’s the dreaded Error 19 (or Errno 19?) that is my issue here. ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [July 6, 2026, 3:43am UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/5 "2026-07-06T03:43:56Z")
I don’t have a Max so I cant verify. But if you drill into the restore image on the wiki you’ll find a side branch in the FS: ```auto \home\sovol\zhongchuang\MKSDEB\root\ ``` It contains klipper.bin and a different script to flash it. Here are the files [Max Bin.zip](https://forum.sovol3d.com/uploads/short-url/kIQ2pY0ibCK2AVtV3cZUrEMN3VM.zip) (22.5 KB) ---
**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\ **Post date:** [July 6, 2026, 7:11am UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/6 "2026-07-06T07:11:29Z")
Hello, In the worst-case scenario, if your product is still under warranty, you can send an email to [info@sovol3d.com](mailto:info@sovol3d.com), including your order number, to request a new motherboard. BR ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 6, 2026, 1:36pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/7 "2026-07-06T13:36:34Z")
OK so you’re still my hero but that didn’t work: Get into bootloader … Flashing CAN UUID 0d1445047cdd on interface can0 ERROR:root:Flash Error Traceback (most recent call last): File “/home/sovol/printer\_data/build/flash\_can.py”, line 481, in run self.cansock.bind((intf,)) OSError: [Errno 19] No such device During handling of the above exception, another exception occurred: Traceback (most recent call last): File “/home/sovol/printer\_data/build/flash\_can.py”, line 661, in main await sock.run(intf, uuid, fpath, req\_only) File “/home/sovol/printer\_data/build/flash\_can.py”, line 483, in run raise FlashError(“Unable to bind socket to can0”) FlashError: Unable to bind socket to can0 ./printer\_data/build/mcu\_update\_fw.sh: line 28: kill: (31338) - No such process ls: cannot access ‘/dev/serial/by-id/\*’: No such file or directory Failed to detect bootloader id! Exiting… Think it’s the dreaded Error 19 (or Errno 19?) that is my issue here. > [@cardoc](#): > > home/sovol/printer\_data/build/mcu\_update\_fw.sh Thanks. I did come across that file but wasn’t sure what it was for. Will give this a shot! ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 6, 2026, 3:19pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/8 "2026-07-06T15:19:14Z")
Cardoc- do you have any idea how that script is supposed to be run? If I try and launch it from that location I just get a “no firmware”. Not a “scripter”, but looks like maybe meant to run through external drive or something? Thanks ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [July 6, 2026, 4:40pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/9 "2026-07-06T16:40:20Z")
The script needs to be launched from: ```auto \home\sovol\zhongchuang\MKSDEB\ ``` with `./root/mcu_update.sh` The script checks for klipper.bin using a relative path and won’t find it if launched anywhere else. ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 6, 2026, 4:58pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/10 "2026-07-06T16:58:12Z")
> [@cardoc](#): > > ./root/mcu\_update.sh still says no firmare: sovol@SPI-XI:~/zhongchuang/MKSDEB$ ./root/mcu\_update.sh no firmware sovol@SPI-XI:~/zhongchuang/MKSDEB$ ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [July 6, 2026, 5:24pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/11 "2026-07-06T17:24:20Z")
The Sovol script is a one shot deal as it MOVES klipper.bin not copies it. After the first run there is no longer a klipper/bin in the /root folder. Here is a revised script that should work. Use WinSCP to insert it into \home\sovol\zhongchuang\MKSDEB\ [mcu\_update2.sh](https://forum.sovol3d.com/uploads/short-url/w57Ae1ZS7CvghTrnyNBH6Q5yZcQ.sh) (1.1 KB) ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\ **Post date:** [July 6, 2026, 5:58pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/12 "2026-07-06T17:58:01Z")
You SHOULD be able to update the bootloader to Katapult. That would allow you to easily update klipper firmware using KIAUH. I’ve never done this so proceed at your own risk. Refer to: > **[Claude](https://claude.ai/share/f3583541-0d9c-4060-addb-4fdbab37559d)** > > Shared via Claude, an AI assistant from Anthropic for more information. ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 7, 2026, 3:11pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/13 "2026-07-07T15:11:50Z")
My good friends from Sovol Support sent me over something to try. Will give it a shot when I get home. Let you know. ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 10, 2026, 11:47pm UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/14 "2026-07-10T23:47:57Z")
Thanks to my good friends at Sovol I am back up and running. Since there was no can0 (Errno 19) they sent me the hex files to install with the STLink. The process was not as hard as I thought. Thanks Sovol! ---
**Author:** ![ATC3D](https://avatars.discourse-cdn.com/v4/letter/a/bc8723/32.png) [@ATC3D](https://forum.sovol3d.com/u/ATC3D)\ **Post date:** [July 25, 2026, 5:14am UTC](https://forum.sovol3d.com/t/bricked-mainboard-after-flashing-firmware/10185/15 "2026-07-25T05:14:57Z")
Happy to report that I was FINALLY able to get my Max running on mainline Klipper! still not out of the woods as seems there are some eddy issues, but adding the Demon macros to get up to speed with him. And all this so I can go to Kalico in support of the INDX kit (on order, not sure when shipping). Also looking at Octopus Pro with BTT Pi for expandability. Gosh I just love learning this stuff! Special thanks to all you folks who have helped me along this journey. Look forward to paying it forward.