Geeetech

Hello,

I'm hoping someone here might be able to help. My last print ended up failing and since then I keep getting a STOPPED message on the screen on my A20M (using a BLTouch sensor) that I can't get to go away and my Z-E Stop switch is always "half-lit".

What I can figure, when the print failed it may have snagged on the cooling fan shroud (looks like it was 3d printed?) and snapped it, along with the extruder fan cover completely off the extruder assembly - found them a few feet away on the floor! There are no other signs of physical damage that I can find, but I've noticed 3 other issues.

• The Z-Emergency stop switch is 'half-lit' at all times. The LED on the switch is fully bright when manually pressing the switch. I found this concerning.

• The BLTouch sensor no longer lights up when the printer is powered on - don't think this is the cause as issue occurs when using non- 3dTouch firmware

• Filament break detection doesn't work - I haven't dug into this yet, but don't think it's the cause.

Everything troubleshot seems to work except the BLTouch not responding and the odd issue with the Z-E Stop switch lighting up. Since the error occurs regardless if I use the 3DTouch version or not, the Z-E Stop switch seems to be my best lead, and until I replaced the control board, I thought I found the issue to be the control board, however the issue is still occurring.

Any switch connected to the Z-E stop port on the control board goes into the half-lit state. I've swapped the X and Z E Stop cables to verify that the issue isn't with the wiring harness and swapped the Y and Z switches.

If powered up with the Z-E Stop disconnected, it appears to load correctly but usually shows STOPPED after given a few commands.

Auto-home seems to increment the Z-axis plane by 10 mm each time it's used.
Since the issue is still happening, I don't know what else to check. I've listed my other troubleshooting below.

• Reseated all exterior cable connections - the extruder assembly, the heated bed, extruder feeders, and the motor control and e-stop connections for X, Y, and Z.

• Extruder cooling fan - appears to work correctly when directly controlled through Simplify3D's Machine Control Panel. I'm not sure how else to test it - I can't get far enough into another print process to verify it's working, but outside of the fan cover being popped off, it appears to be operating just fine.

• Extruder - heats up as expected when using the Prepare menu on the printer and when using Simplify3D's Machine Control Panel.

• Extruder feeders - feeds filament as expected, I am able to extrude filament just fine.

• Stepper motors - able to move the extruder assembly and build plate as expected

• Wiring harness - verified by using a multi-meter to verify conductivity on the Z-E stop and X-E Stop cables. Swapped the Z-E Stop and X-E Stop cables. The issue follow the port on the board, not the cables.

• Re-flashed the control board with the latest A20M firmware (Marlin 1.1.8) found at github here: https://github.com/Geeetech3D/Prusa_I3_3Dprinter ○ Issue persists regardless if I use the regular a20m or the a20m with 3DTouch versions

• Replaced the BLTouch sensor with a brand new one

• Replaced the control board with a new GT2560 V4.0 control board for the A20M.

I'm at a loss on how to get rid of the error. Any ideas? Thanks!