HDMI power circuit on the Raspberry Pi 4 - Raspberry Pi Stack Exchange
Lesson-02 Setting Up the Raspberry-Pi 4 Model-B Board - SonaLabs
Amazon.com: GeeekPi Raspberry Pi 4 4GB Kit, Retroflag PiStation Case with 5V 3A Power Supply, 32GB Card, 2PCS USB Wired Controllers, HDMI Cable, Case with Fan for Raspberry Pi 4B (4GB RAM) :
Raspberry Pi 4 Just Released: Faster CPU, More Memory, Dual HDMI Ports | Hackaday