The voltage regulators on Apple’s 17″ flat panel monitors have been failing and there’s a great deal of justified hand-wringing and irate anger at Apple’s inflexible out-of-warranty strategy which is to replace the monitor at a $500+ cost. If your Apple LCD is flaking out, go directly to Monitor Experts in Anaheim – they can fix them at a fraction of the price.
Not affiliated with them in anyway, just a satisfied customer with three formerly dead displays.