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I want to know if the power board supports 240 VAC as LG after a lot of probing accepted that their power board is rated 100 - 220 V but I would like to know if someone has actually opened the TV and seen the rating information on it

Dato Chkhartishvili  yes your TV’s power board is is a EAY64749001 and rated for 240V.

No, @Dato Chkhartishvili There is no chance of Blow up with 240 voltage alternating current. It contains absorption power around 240. So it will handle it very easily.