This should be listed either in detailed technical specs or on the back of TV.
They used to list voltage ratings very clearly in manual and listed specs, but now often enough, this info is missing.
Me think either all the stuff is 100-220v compatible, due to global economy, or companies think consumers are too dumb, or don't care for this things to be listed.
There should be a label somewhere in back, close to power supply listing operational voltage and amperage. They used to have switch there to choose voltage, but I think most newer stuff is self sensing and if it says something like "110-240 volts" you're good to go, as long as you have plug adapter.