Geeetech

If you don't home the printer after you start it, all the axes will regard the original coordinates as the home position and will only go in one direction.

hi,if it's actually quality problem,the after-sale will send you a new one...

Of course you can.

Did you fix it?I guess it is the firmware issue.

Congratulations.

Fans 1/2/3 are common ones that have the solid speed,you need connect the fan to PWM_fan if you wanna control the speed.

First make sure you can extrude the filament smoothly(though hard) with you hand.
If you can't make it successfully,the nozzle size may have a problem i guess.
Then you can set the nozzle diameter in Slicer Settings to 0.2 or 0.3mm to see if there is a difference.

You need give the power to the board first if you are using RevA+...

Maybe you can refer to this to modify the pin assignment of Y_min and Y_max to take a look:
viewtopic.php?f=20&t=18020

Your Y axis has a layer shifting.
Check if the motor on Y axis was losing steps or the bearing on Y smooth rods is hard to move(spread some lubricating oil on them).
Additionally,check the belt on Y axis is too loose or too tight.