headrest dvd player, no power...but?

hi i have 2 headrest dvd players fitted professionally, hardly used, 1 hr & 2hrs, one stopped working then the other, power is still to the leads, is there a replaceable internal fuse inside the players? in the manual it says; power voltage; dc 12v/1a. does that mean there is a 1a fuse inside to change? thank you

nanna
February 2009