SamyGO

Can I replace the c6000 board with the d6500 board so i get the smart tv platform? or maybe i have to change also other part?

absolutely!
just board is needed.

But... sometimes it is good idea to use search...
viewtopic.php?f=9&t=4517&p=34206#p34206
viewtopic.php?f=15&t=4712#p35495
viewtopic.php?f=13&t=4556&p=35220#p35220

c6000 is 2D TV, but d6500 is a 3D. Do you think you can get the 3D only by changing boards?

Yes. I don't think. I know.

p.s ah, you`re talking about 3d. This i can`t confirm it will work, but despite this, other functional is ok.

interesting... How about c6510....can be replaced by d6510 or even es6510?

Nah, this is another story. Even dont c6000 to c7000. Just same class (6->6).

OK, I mean I have 40C6510....can I replace it with d6510 or es6510 board?

NO.

I'm confused

So is C6000 -> D6500 (i.e. what tempinbox asked in 1st post) finally possible, or not possible?

I know a guy who wanted to convert his c6000 to d6100 some time ago - I said "forget it, most likely downright impossible, if possible it wouldn't be easy - not worth the trouble".
Now I'm not sure anymore.. Both models use 100Hz panels (with "dumb" T-Cons), FRC and/or 3D circuity is on the mainboards in both models, so in theory it may work, but will probably require some rewiring (or a lot of it - LVDS cable, power supply connector, IR & function connector - I wonder if "eco sensors" in both models are compatible ?). Very small chances for working 3D after the mainboard swap (IR emitter missing & 3D sync signal not likely present on the C6000 panel LVDS connector, and so on).

yes, sbav1, you`re right about everything including rewiring - this is definitely needed. The problem is - none reported about any test. So the answer is sill "not possible"...
p.s. maybe such upgrade could be possible if we change m/m together with t-con. The power supply board isn`t problem. Just keep in mind, the replacement of m/b+T-con+lvds cable is costly. Don`t believe this is acceptable.