Many, if not most, LCD screens have a plug in power cord like on an MP3 player. That cord leads to a small transformer box which has a specification on it (like 100 - 240v, 50Hz/60Hz). Into that box goes a mains lead which can be European or Canadian. If that's the type of power arrangemtn you have, then you only need a Canadian power cord or a plug on the end of your existing power cable.

If your LCD monitor plugs directly into the mains, then you should check on the back of a monitor for a 110/230V screw/switch and a specification tab to confirm the dual power capability.

If neither of the above pertains, then you'll have to scrap the monitor or buy the previously mentioned step up mains transformer.