Supposed to be genuine Sanyo .. I asked several sellers how to tell the difference.. the original STKs had 5 character ID beginning with "A".. the replacements had 5 characters beginning with "B" .. appeared to be identical..
I'm so depressed after spending $60 for nada that i don't know what to try next :(

Don't have acetone but i tried paint thinner on the STK lettering.. no effect on the old ones or the new ones.. I got 35V from pin 1 to pin 5 on both ICs but couldn't duplicate it.. zero from pin 1 to pin 4 on both.. rechecked all the fuses on board D (six 3.15A & one 2.5A) & G (two 5A & one BUS).. A-OK.. any ideas what i should do?

Thank you sooo much for your help :) .. You kept me going when i wanted to give up.. I spent an hour looking for the problem, checking fuses and voltages.. Finally I looked closer @ the joints on the IC that wasn't heating up the heatsink.. found a joint that was next to my problem joint and I had accidentally sucked off the solder becuz of a bridge .. added a bit of solder and installed D and G boards and VOILA! the convergence worked! :D haven't fine-tuned it yet but to me, it's a million bucks! Nvr had a big screen b4.. I think i'll enjoy the rest of the French Open tennis and Wimbledon haha! Oh the heatsinks are really hot.. i think i'll run it with the back off and a small fan blowing.. I can see why the ICs fail if there's no ventilation.. they must be scorching!!! Thanks again for your help :)

Thanks for all your great advice, Larry.. I never would have attempted this repair if it wasn't for your excellent tips and information.. You make this website "ROCK" lol!