I'm an IT

There's a certain three letter combination here that tells the truth about my computer skills.
When it boils down to it, I'm really the blind leading the blind.
I've struggled all day to find an answer as to why my internet connection keeps dropping back to local access only when I'm doing some wireless streaming connected by HDMI to the TV.

All. effin. day. With no definite answer in sight.

Can you see the three letter combination I'm talking about?

Ah well. Until tomorrow....