Lights do not work

Hi,

I've tried getting the lights to work on a RPI3B+ to no avail.
I've checked:
* Python 3.7.3
* just-updated pi
* original pi PSU
* GPIO is working (tested a few pins with same code)
* SPI and IC2 both enabled in raspi-config and confirmed in config.txt
* full buster installed (tried with buster lite too)


Any options I've missed? 


TIA



C