(1) To test a new electronic system by running it for some length of time. Although electronics can give out at any time, weak components often fail within the first few hours of use. For example, when a computer is built to order, it is often turned on and allowed to run for several hours before being released to the customer. See burn.

(2) (burn-in) The persistence of a faint image on CRTs and plasma TVs, both of which create a display by causing phosphors to glow. Burn-in occurs when static images are displayed continuously, and the glass is actually etched with the color phosphors. Quite common on early computer CRTs, it may occur with plasma TVs when used for video games that are played for countless hours. See CRT, plasma and LCD vs. plasma.