electronic got fried

[ash2k14]

I already contacted the tech support last friday, they haven't replied to me since. Furthermore, this printer I bought from aliexpress and I got 8 days left before the purchase protection ended. By then I am going to have a dispute

[ash2k14]

Do you notice from the photo of the back of the board, 2 pins next to the qc pass sticker, there are very thin silver coloured lines connected, that I think thats the main reason. Before I took the photo, I cut the thin solder iron bridge by using my finger.

[zhangxueyou]

Could please highlight the position?

[ash2k14]

Here it is, marked with the orange arrow,

[ash2k14]

Here is the picture one of the step sticks got fried. I know this is rare but it really do happened to me

[zhangxueyou]

Even that 2 pins are connected, the chip will not be burned becuase the current their is too low.
Did you plug the A4988 correctly? You can see "GND" on board as well as A4988.

[ash2k14]

There were no labels on the main board, however, I plug the stepsticks just like these, the picture I posted before and the orientation also based on the guide as well.


Or could it be the stepsticks were faulty as well?

Also, I get this error avrdude: stk500_getsync(): not in sync: resp=0x00 when I tried to burn marlin firmware

[ash2k14]

There were no labels on the mainboard and this is how I plugged the stepstick as well, referring from the picture in the build guide wiki

[zhangxueyou]

Yes, your wiring is right.

[ash2k14]

I also would like to stress out that, I am unable to burn marlin firmware by following your online guide, what is more through the arduino ide. Whenever I tried to burn the firmware I would get this error avrdude: stk500_getsync(): not in sync: resp=0x00 even though the correct board were chosen. I also believe the chip lack of bootloader