A30 not responding on boot

[macray76]

Hi.

My A30 is no longer responding to any commands on boot. This was after I carefully adjusted the A4988 stepper motor driver's voltage on the Z-axis as instruction from my support contact (I'm not inexperienced with this as I've adjusted the voltages before so I know what I'm doing!)

On boot I notice that a couple of the internal fans start and then instantly stop.

The LCD screen is on and responding to touch. The current temperature readings of the bed and nozzle are 0 and I can't move any of the axis.

I can connect to the printer via USB using the smartto motor tool but it won't get any readings from it. The smartto firmware upgrader tool doesn't connect though.

I'm at a total loss as to what I can do to fix this issue. I've had constant issues with this printer (the main one being auto-levelling which still doesn't work and has badly scratched my heat bed as a result).

I've had the printer for only 7 months now but I'm getting to the point where I'm going to return it for a refund as I just want a printer that works as it should.

Any help is greatly appreciated right now. If I can't resolve in the next day or two I will return it.

[macray76]

I have removed the z A4988 driver from the board and it now boots successfully with temperatures being red.

When I plug it back in, same non-responsiveness.

Seems like a broken A4988 driver after adjusting the voltage.

[_kaktus_]

Hello.


You can still check another thing.
That the µC port that controls the defective stepstick module has not been damaged.
To do this, replace the working module from another socket and try to drive the stepper motor.

[macray76]

Fortunately a new A4988 has brought the printer back to life! Now I just need to resolve the other issues (see my other thread)!