Same problem, just more info to post. Hitachi 50EX10B, press power
button, led comes on, set shuts off. Stand by power OK. Kept blowing B+
fuses after replacing the HOT. I disconnected the anode of the green
CRT, and it doesn't blow fuses anymore. Other tubes OK. But, the dang
thing still will not power up. Same symptom above except not blowing
fuse with green tube disconnected. Flyback checked good. Resoldered the
drive transformer posts as was suggested, but no luck. I believe I have
a 2 part problem. Probable bad green tube blowing fuse, and something
else sending set into shutdown at power up. Have to unplug, and plug
back in to get power led to light. Otherwise the power button will
still cycle the relay, but no light from power led. Hope someone has
experience with a similiar problem. Thanks group.