You can purchase an HDMI selector to be able to do what you are asking. No, you will not do damage buy using a selector. I am unsure what is included with the purchase of the selector so you may need to purchase another HDMI cable if you do not have an extra one. Also, how old is your tv? One HDMI? Depending on age and size of TV, the selector might be half the cost of a new TV. Just saying....