Ender 3 S1 STM32F401 crashes while printing

Hello,

Here is ZIP archive with all files i refer below.

I was printing this gcode: ForHaiv3.gcode
STL: ForHaiv3.stl

on Ender 3 S1 (STM32F401 chip) with latest Klipper firmware.
Klipper version: 0.10.0-521

Print stopped by itself and in web interface I saw message that connection lost.
And nozzle stay in same position and left trace on the model: see nozzle_trace.jpeg in Archive.zip

After that I didn’t do anything and copied logs: see “logs” folder in Archive.zip
printer.cfg is in Archive.zip too

With this model it happens second time. Before I got this issue with another model one day ago.
And after this happens I can’t make printer turn on again, the only fan inside enclosure works and nothing more happens.
In web interface I see “Printer is not ready”. The video is on “video.MOV” file from atached Archive.zip

Usually when printer starts without issues I have lights on CRTouch modules at least, but after this “crash” they stay off when I turn on the printer. Also display stays black.

After that it takes up to 1 day to make printer work again. I try to flash original firmware, turn off/on , disconnect it from socket and let it stay like that for few hours, try to flash the Klipper firmware again. Nothing helps and I stop trying, forget and then later after a while I try to turn on the printer again and it starts working. Don’t have idea what fixes the printer, looks like some magic fairy arrives and fixes it for me. And then I try to print that model again and again printer gets bricked. It happened may be 3 times already.

I also disassembled the printer to make sure I have correct voltage and everything ok by this video from Creality (“Service tutorial Ender - 3 S1 boot troubleshooting” on youtube). Also was monitoring voltage in socket, so it was always 220-230 the time when printer works correctly and after this issue happens.

Before I was using original Creality firmware and also professional firmware from mriscoc. And I didn’t have this issue.

Anybody knows how can I troubleshoot this?

Just for info, I removed positive PIN on USB cable which used to connect RPI to the printer. Looks like now it works without those issues.

Another update. Later I got this issue again, printer was turning off during print or didn’t turn on at all. Creality send me a new motherboard. When I disconnnected old motherboard I saw melted plastic connector where heater connects. So, it was bad connection, but and high current and the connector was heating up and melted down.

So my problem was not related to klipper at all.

For information. I got a new motherboard from creality and soldered those wires instead of using the connector. Since then don’t have issues.

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