Clicking print does not start print!

[Micah_Sturtevant]

What is the problem?

When I click print, nothing happens.

What did you already try to solve it?

Tried running in safe mode, pid tuning, reinstalling OctoPi

Have you tried running in safe mode?

Yes

Did running in safe mode solve the problem?

No

Systeminfo Bundle

You can download this in OctoPrint's System Information dialog ... no bundle, no support!)

haproxy.log (19.8 KB)
octoprint.log (21.8 KB)
plugin_pluginmanager_console.log (11.8 KB)
serial.log (148 Bytes)
webcamd.log (2.6 KB)

Additional information about your setup

OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible

Ender 3 Pro, OctoPi, Raspberry Pi 3B+

[PrintedWeezl]

You have an issue with the connection.
First try to select 115200 as baudrate instead of auto - that should be the right baudrate for your printer.
Then try other usb cables - preferably a quality one with ferrit beads.

Also read this post

My Creality Ender3 runs into a lot of communication issues

A lot of resend requests or a high resend ratio in OctoPrint can be quite a problem when trying to reliably print. For Creality Ender3s - apart from the usual suspects - this can apparently also be caused by the LCD cable, as user @flrnwgnr reported. To quote: [...] The day before i printed a drawer and pushed the cable for the LCD just behind it - like this: [Cabling before] And that was the problem! After i re-arranged the cable according to the picture below (as I had it before and as …

Please enable serial logging so we know what's going going on if the connection fails again

@foosel

serial.log : A log of all of the communication going on between OctoPrint and your printer. Usually disabled for performance reasons, enable it through Settings > Serial Connection.

[Micah_Sturtevant]

Hi! Thanks for responding! Just now trying to do what you showed me I started getting this when connecting State: Offline after error
No more candidates to test, and no working port/baudrate combination detected.

[Ewald_Ikemann]

For it's a Creality machine try with/without SD card in the printer and/or this:

Put tape on the 5V pin - Why and how

First of all this whole tutorial isn't a mandatory mod - you just need it if you run into issues (weird things are happening and you've already ruled out the more common suspects) or if the always running fan and illuminated display (even when the printer is turned off) disturbes you. I'm starting with the why part: If you connect a 3D printer via USB to your Raspberry Pi it can lead to all sorts of power related issues. Most of the time those issues occur only if you turn on your pi before …