Samsung TV FIOS Box Problems

[BoogieNYC]

We have a Samsung Smart TV (less than a year old) and a FIOS cable box. Someone touched a button or two and now the TV won't display anything but ACC Digital and a graphic display of folders (I believe channels).

We've got one Samsung remote and one FIOS remote.

Any suggestions? And yes, I know this is ridiculously simple but I'm out of town and can't solve this hands on myself.

Thanks in advance for any help.

[CRobGauth]

Have they tried hitting the source button on the Samsung remote?