Reminds me of those power outlets that turn ON at dusk and OFF at dawn. About $10 at Home Depot:
The Thing 1 idea is to make a simple circuit that monitors the 4 brick outputs and turns ON a "fault" bulb or LED if one or more bricks trips its breaker. This "fault" lamp would be placed against the outlet light sensor. Ta da! When the bricks are all working, the fault light is OFF and the outlet thinks it's night-time and turns on. If any brick trips the fault light is ON and the outlet thinks it's day-time and turns off. This widget only has 2 AC outlets so a 4-outlet power strip could be used to power 4 bricks. Other similar light sensing strips have more outlets but I figure the existing bricks are probably already connected to a multi-outlet power strip.
