How to turn Old Laptop Screen into External Desktop Monitor - YouTube
How to Connect your Laptop to a Monitor and Use Both Screens - Tech Advisor
How to use a laptop as a monitor
Amazon.com: 14 Inch Triple Portable Monitor 1080P@60Hz Laptop Screen Extender for Dual Monitor Display, Portable Triple Screen for 14"-17" Laptop, Support Windows, Chrome, Mac System : Electronics
Dual Screen Laptop Is A Slick DIY Build | Hackaday