MK3 stuck in startup loop after upgrade to 3.9.0  

RE: MK3 stuck in startup loop after upgrade to 3.9.0

I've reverted back to 3.8.1 for now, and my printer is working again. But would still like to find out why I'm having an issue after flashing to 3.9.0.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

So my printer is actually not working as it's saying to flash to 3.9.0. So I need to figure out what my issue is. This is from Pronterface:

start
echo: 3.9.0-3421
echo: Last Updated: May 18 2020 17:11:59 | Author: (none, default config)
Compiled: May 18 2020
echo: Free Memory: 1646 PlannerBufferBytes: 1792
echo:Hardcoded Default Settings Loaded
adc_init
CrashDetect ENABLED!
PAT9125_RES_X=0
PAT9125_RES_Y=240
PAT9125_init:1
FSensor DISABLED
Sending 0xFF
Error:volume.init failed
[ERROR] Error:volume.init failed

Sending 0xFF
Error:volume.init failed
[ERROR] Error:volume.init failed

RE: MK3 stuck in startup loop after upgrade to 3.9.0

Hello you mean you cannot just click to validate the information that new firmware is available ?

RE: MK3 stuck in startup loop after upgrade to 3.9.0

Hi
I also have a problem installing firmware 3.90 on my mk3s + mmu2s, the firmware is installed but with an error (flash failed) and only in English, then it is not possible to change the language if I select Italian, it returns to the language selection menu in a loop.
the firmware I downloaded is this: prusa3d_fw_3_9_0_MK3S_1_0_6_MMU2S, and this is what I'm trying to install: prusa3d_fw_MK3S_3_9_0_3421.
For the moment I have returned to firmware 3.81 which works without good.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

So I was able to go into Printer Settings (Advanced) and modified the Custom G-Code to remove the check for updated firmware, and now my printer is working again on v3.8.1. But would still like to know why I'm running into the issue when downloading and flashing to 3.9.0 as I would like to update eventually.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

You can disable the checks for firmware, printer and nozzle or set them to warning only (continue after pause) in the printer setup menu.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

@bobstro

I did that and reverted back to 3.8.1 and was able to print again. Still want to find out why my printer goes into an infinite startup loop after upgrading to 3.9.0.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

@alessandro-m8

If I remember well I did had the same problem when I started in 3.8.1, impossible to switch to French, it was a loop. I just did flash again the same firmware to solve it.

RE: MK3 stuck in startup loop after upgrade to 3.9.0

Is it necessary to reinitialize EEPROM after upgrade?

RE: MK3 stuck in startup loop after upgrade to 3.9.0

Posted by: @towlerg

Is it necessary to reinitialize EEPROM after upgrade?

Not always but it can be a good idea if you're running into inexplicable problems.