I purchased this 3.5-inch TFT Display with my Pi 4B:
https://www.pishop.us/product/3-5-inch- ... t-display/
http://kedei.net/raspberry/raspberry.html
I followed this guide to get it working, and it worked! (Though it's now slow on the small screen, and wi-fi is no more?)
https://osoyoo.com/2016/09/13/install-r ... an-jessie/
Regardless, I want to get it working again on HDMI (my monitor) and it won't go back!
I'm using this in terminal:
cd LCD_show_v6_1_3
./LCD_hdmi
This reboots it... but it comes back on the small TFT screen again. These commands are supposed to put it back into HDMI.