I have an automation pHAT, connectedit to a Pi Zero W using the mini Black Hat hack3r, along with a piTFT.
All was fine for a couple of days, then powering it up one morning, the TFT gives out noise. Removing the Automation pHAT solves the problem.
I have checked the GPIOs and there are no clashes. So:
Automation : I2C + GPIO[5, 6, 12, 16, 20, 21, 37]
TFT : SPI + GPIO[7, 8, 18, 24, 25,]
Apart from breaking out the SPI to a pin header, what could cause the automation pHAT to confict with the TFT?