TV = Samsung 40" UN40H6350.
JA: How old is your Samsung, and have you tried unplugging it and leaving it off for a few hours?
Customer: TV is from 2014, I'm pretty sure.
JA: Does the TV menu work? Do you have the same problem on all sources/inputs?
Customer: I unplugged it, but only for a few minutes. Changed batteries on Remote. Held down all buttons without batteries. BEFORE I did all that, at least the "SOURCE" button worked! Now, NOTHING. No "SOURCE," or access to Apps such as amazon, no directional ability, ZERO Samsung Remote Control
JA: How long has this been an issue? What happened right before this popped up?
Customer: I haven't used this remote in a year. My cable Remote and its Menu work fine. I first used the Samsung Remote to access the "Mirroring" ability for my phone. That worked, until I took steps to "fix" the rest.
JA: Anything else you want the TV expert to know before I connect you?