Ok, got it. I hadn’t thought of the other connections in the linked schematic and only focussed on the connections in your comments. Thanks for the patience. Here’s what I tried now. nth time is the charm.
5V hooked up to VDD
Ground to GND/DIR/STEP
SLEEP connected to RESET (tried both with and without this)
4.5V to VMOT (motors rated 4V) but also tried 12V
Pot from mini to maxi.
With the above combinations, motors not connected, I measured the voltage at 2A/2B and 1A/1B but got nothing.
Connected VDD to a 10k resisistor, which in turn is connected to STEP/DIR. All else is similar as above (tried SLEEP/RESET jumper on and off, 4.5V as well as 12V for VMOT, max/min pot) but did not connect motors. Instead tapped and also held ground to STEP and measured voltage at 2A/2B and 1A/1B, registering nothing.
Is there still something I’m missing, or could this be conclusive? Cheers.