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Hello, The "rust" you are seeing is actually dried chemical fro the inside of the capacitor which does indicate the capacitors have bulged and blown. Even one or two bad capacitors will keep the power supply from starting up correctly. You need to replace them and the power board should be as good as new. Remember that when you replace them that they all need to be replaced not just the ones with visible bulging tops. The reason why you need to replace them all is two fold. First when some go out it puts a strain on the others and second you down want to have to keep opening the tv to replace them a few at a time every few months when they keep failing. If you need information on the capacitors to replace here is a link to capacitor information on the Digital Lifestyles models. http://www.ccl-la.com/catalog/index.php?cPath=95_101
if you had a surge, it could have damaged more than just the power supply. When you plug in the unit, does the power indicator light up??? your main board could also have damage. The main board sends a signal to wake up the power supply thus turning on the TV. If you have to replace the main board as well, it probably won' t be economical to repair the set.
Working with a cracked screen has overstressed the T-con board and the power source. Now they have failed for good.
Since the screen is defective this tv is effectively dead : try to sell it for parts (ask less than 75 pounds for it) and buy yourself a new one.
I work at CNN Have had 6 of these monitors go out in as many months. Take out the power supply and change the 2 exploded 680u capacitors. They're being overheated by the underrated MOSFETs on the reverse side of the board. I'm looking for some substitute MOSFETs that handle power better; but replacing the caps will usually fix the problem. Otherwise replace the supply.