remote not working?

Possibly a Samsung Smart TV but the original poster didn't bother to give us even that detail, let alone th emodel.

Here's something that may be relevant: http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx=167377&modelname=LN46A850S1F

She could also check the Smart TV is still connected to her router.

Smart TVs should have smart owners.
March 2015