The Student Room Group

No signal - swapping ends of HDMI cable provided signal

Wtf????

So I moved my TV box from one room to another. I had just the COAX cable in and the box had picture but said not all features available. Then I noticed the picture is laggy / stuttering. And after 10 minutes my TV said "No signal".

I then connected an ethernet cable and the box no longer said "offline" but still no picture. Only when turning off and then on again did I see for a moment the "Welcome" screen from the box.

I then called support and the lady said swap the ends of the HDMI cable.

I did.

Suddenly the picture is there and no stuttering.

How? How can swapping ends of a cable be a problem / the solution?

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