Wk173 not going back and forth

Hello, I build this kit, I have not soldiered the jumpers, but the lights will not move back and forth… I switched out leds which are 2.2v. Do I need to switch back to original leds or did I mess something up?


Which leds are you used?

Can you send clear pictures of the solder side, and component side of your PCB.

Best Regards,
Velleman Support