This TV supposedly has or based on the Hitachi chassis DP15, which is in Hitachi models 43FDX10B, 43FDX11B, 53UDX10B and 61UDX10B. I searched all them models and didn't find any no video or sound problems.
When turned on you hear reply click and power light stays on and TV stays on as if it was operating normally. But theirs no picture or sound except a pop from speakers when turned on. On the circuit boards all green and red Led's are steady lit, no pulsing or dimming. Theirs no high voltage static charge sound to the CRT when turned on.
I removed the convergence Chips after i seen a bad resistor RK54, values 1.8ohm 1 watt to see if any different but still the same. No Video/Sound.
Sometime the flyback doesn't come on, When it does picture cuts off like its losing voltage but within few seconds it stop and pictures fine.