macOS: How to Turn Your iMac into a Secondary Display - The Mac Observer
My Mac's Monitor or Screen Won't Turn On - Support.com TechSolutions
How to Calibrate Your Apple Mac Monitor (iMac, MacBook Air and Pro)
Use MacBook Pro as second monitor for iMac? - Ask Different
27-Inch iMac With Nano-Texture Display Unavailable From Apple Until Late March - MacRumors
Are iMacs just monitors/display? What I mean is that do you have to buy another computer or MacBook to connect to, or can I just use it completely as is? - Quora