It could be your soldering on the Zero or pHAT itself. The joints that matter are illustrated in this thread and I’d recommend giving them a makeover:
http://forums.pimoroni.com/t/phat-header-soldering-the-lazy-way/1690
(6 leftmost to be exact)
It could be your soldering on the Zero or pHAT itself. The joints that matter are illustrated in this thread and I’d recommend giving them a makeover:
http://forums.pimoroni.com/t/phat-header-soldering-the-lazy-way/1690
(6 leftmost to be exact)