For more displays, the usual is the USB Video cards. These are plentiful on Newegg.com and Amazon.com for when you need that third independent display.
Hi, I have an HP Pavillion Laptop, the laptop only has 1 HDMI Port and no other port for monitors. It has 3 USB ports and that's it. Is there a splitter or adapter that can work so I can have 3 screens working.

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