HZ ADAPTER (Toshiba 40" LCD TV Full HD 40ZF355D)

[qanda]This thread is about the Toshiba 40" LCD TV Full HD. Click here to see full specs[/qanda]Could someone answer this question. I would like to install a 120 hz on my 40" TV but would it do any good? If so, is it just a matter of plugging in an 120 hz adapter OR do you to go inside to make the change. I’m not that electronically inclined.