Geeetech

Check this post:
viewtopic.php?f=17&t=19104

Upload the firmware via Easy Print:
viewtopic.php?f=45&t=18672

@ tenacious
You can try to upload the firmware with Easy Print or HyperTerminal,not Flash Loader.

I'm not sure about that:

It feels like so many people add extra fan, are they all soldering wires and adding power splitters ?

This pic has a good illustration for the driver: As for Z axis issue,check this file to make some troubleshooting:

Yep,the experience is so precious.
Maybe you can post some nice works you have printed.

As you described above, 1)The heating of extruder is OK 2)Motor good 3)Cable good 4)Driver good So i assume the extruder socket on your board may be broken(no output signal) somehow... Anyway,you can try reflashing the firmware for it to take a look: http://www.geeetech.com/forum/viewtopic.php?f=45&...

Hi,
You can download it from the following post:
viewtopic.php?f=27&t=18263

Hi,David
Did you fix the problem?
I guess the max current for that motor is 1.2A or 1.5A.
And i'm not sure if your extruder has the issue as the following post shows:
viewtopic.php?f=19&t=18507

Did you notice this file
3DTouch auto leveling sensor User Manual version2.0.zip
on the following page:
https://www.geeetech.com/geeetech-3dtou ... -1010.html
It mentions Rev A+ in the manual.