MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting - Hardware, firmware and software help

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

Vincent — Fri, 06 Sep 2024 19:31:25 +0000

I just had this issue and found a way to fix it (Although I can't really explain why that worked...):

-I installed the latest firmware (6.1.3) with an official Prusa USB key.

-Got the same issue: the orange status bar stopped midway. Restarting the Prusa wouldn't fix the problem.

-I took another (non-Prusa) USB key, transfered with the same latest firmware (6.1.3) and plugged it in the Prusa while the orange bar was stuck midway.

-A new message appeared: "Updating bootloader". After this installation was complete, the Prusa booted correctly!!

Maybe the official Prusa USB keys have some defect making it able to install the new firmware and not the bootloader. And the new firmware can't be booted with older versions of the bootloader? I don't know... but it worked! I hope this helps somebody else! :)

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

Jean.de.BZ — Wed, 21 Feb 2024 09:15:44 +0000

My MK4, delivered last week, has firmware 5.1.3 And this bootloader problem which hangs during launch also appeared (2 or 3 times)

Once, the reset was not enough (new blockage), the machine had to be turned off and restarted.

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

3DWT — Sun, 18 Feb 2024 16:37:34 +0000

Posted by: @jlhutchence
I had the same problem when I set up my printer. I uploaded FW 5.1.0 so I could get the printer up and running. I have now been able to upgrade my firmware to 5.1.3 via Prusa connect.

Hope this helps others with the same problem

I didn't use Prusa Connect. What does Prusa mean to solve the issue?

But when Prusa Connect the only option to solve the problem is, then i must create a account only for updating...not realy a fine solution.

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

JLHutchence — Tue, 06 Feb 2024 23:20:51 +0000

I had the same problem when I set up my printer. I uploaded FW 5.1.0 so I could get the printer up and running. I have now been able to upgrade my firmware to 5.1.3 via Prusa connect.

Hope this helps others with the same problem

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

jegocr — Fri, 02 Feb 2024 12:16:12 +0000

I have the same problem as the person who opened the thread. So I have also reverted to 5.1.0. Today I tried the new version 5.1.3, but again the MK4 won't finish booting. Now I'm back to 5.1.0 again...

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

lars_butnotnils — Mon, 08 Jan 2024 13:53:28 +0000

Same problem here: Got the printer with FW 5.0.1 -> updated to 5.1.2 without any problems. After a restart, it gets stuck in the start screen.

Downgrading to 5.1.0 fixed the problem, but a bad solution...

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

3DPrintableArts — Sat, 30 Dec 2023 13:19:04 +0000

It was me who reported that on GitHub.

still didn’t find a solution. I reverted back to the previous version.

I guess I’ll wait for next update.

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

Area51 — Sat, 30 Dec 2023 00:50:54 +0000

I had the same problem and found this GitHub issue on the upgrade problem: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/3629

I have downgraded to version 5.1.0 and the boot now works again - the bootloader is kept at the new version 2.3.4.

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

ChiTownGuy — Thu, 28 Dec 2023 21:16:46 +0000

I was able to upgrade my MK4 from 5.1.0 to 5.1.2 without any problems.

RE: MK4 after update Firmware 5.1.2 (Bootloader 2.3.4) Printer is not starting

ChiTownGuy — Wed, 27 Dec 2023 19:11:26 +0000

Is this common enough for me to avoid 5.1.2?