Full model number is LN46A530P1FXZC.  I fixed the same model previously with a washed out screen by replacing the TCON board here.  This one had trouble turning on.  Checking the power supply board, I found two bulging caps.  Both had values of  1000uf/10V.  I replaced them with 1000uf/16V (just slightly taller) and the TV powered up fine.