I followed YngF’s advice but didn’t work for me. I took a similar but different route and it now works:
burned v 1.8 image from “https://ozzmaker.com/piscreen/PiScreenImage-SDCard-1.8.zip”
sudo apt-get update
sudo apt-get upgrade
sudo reboot
HERE SCREEN WENT WHITE
sudo /boot/config.txt
add line “dtparam=spi=on”
sudo raspi-config
8 Advanced Settings
A6 SPI
SPI Enabled? Yes
Confirm Yes
sudo reboot
sudo rpi-update
sudo reboot
HERE SCREEN BACK TO WORKING
FYI, /boot/config.txt has the following lines which are slightly different than the posts above:
dtoverlay=piscreen,speed=16000000
dtparam=spi=on
Hi!