Just assembled GoPiGo2, updated all FW and launched basic_test_all.py. Sent cmd: w, right motor was rotating but left was not. It seems that there is no signal on left terminal. Also tried cmd: i - and it did not work as well. Swapped motors and one that was connected to the left terminal was not rotating. So motors themselves are fine.
Is it a HW issue or SW? And how can I fix that?