Iam using RPI4 B 1 GB with Waveshare 10.1 B touch screen for home automation wall mount touch panel.
the problem is after about one or two month somthing wierd happens to screens. there is some colorful noise . and these noises showing up after power outage. also with powering it off for few hours the noises will gone and every thing works nicely again. some times i have to power them off for few days to solve this problem. Have a look at my ultimate college packing list as well!
i have tried these:
1- new sd card with fresh installation of kiosk mode chromium (raspbian buster).
2- changed the power of touch screen and RPI
3- changed the touch screen ffc cable
4- changed the HDMI cable