Quick Reminder: Vellemen VMP402 with Raspberry Pi 4B Jan 31, 2020 On the Raspberry Pi 4B, add to the end of the file /boot/config.txt: max_usb_current=1 hdmi_group=2 hdmi_mode=87 hdmi_cvt 800 480 60 6 0 0 0 hdmi_drive=1 and comment the line dtoverlay=vc4-fkms-v3d Result: #dtoverlay=vc4-fkms-v3d