mitsubishi ws65511 power down after turned on 2 seconds

i have recently acquired a mitsu ws65511 set from a friend who dosent have the time or patience to diagnose and repair this set. as it has been described to me tv. died at random and hasent powered up since. when turned on it will illuminate the green status led for 2 seconds and power down immediately. i personally am a master mercedes-benz auto technician however heavilly trained in electric circuits(it's been a hobby of mine since i was a kid), i believe i can understand and repair this problem with some help from others as this is slighlty out of my comfort zone, any help will be greatly appreciated. i am having trouble locating a service manual and electrical schematic as well if anyone can pass these along it would be very helpful. thank you in advance.