First of all, the best solution to keep your LCD TV safe and secure is to mount it on a wall. The wall brackets for all kinds of LCD/LED televisions are available these days and it will not only protect your child, but will also guard your TV from an earthquake.
Make sure you do not leave any room behind the TV cabinet or chest of drawers, if you have placed it there. There are locking bars available these days that tie your television with the wall, ensuring it does not fall behind or ahead.
One of the best ways to ensure safety of your toddler and television set is to place it on a TV stand and mount it on a wall. Make sure you install it at a safe distance from your toddler. This will ensure him/her does not climb up the chest of drawers and reach the television.
You should also cover up any sharp edges of the table/stand you are using to place your television. Children are very likely to walk up to the edge of the television table and might hurt themselves with the uncovered edges.
You must also make sure that you hide all the cables connecting to and leading from your television set. These can be an easy way for your child to pull the television and drop it on the floor. You can join all the cables together using simple cable plugs.
Lastly, make sure you cover all the physical buttons present on the front panel of your television sets from the reach of your toddlers.