Theoretically well, practically were reviews here misleading

I bought this distributor in order to connect to PS and then join up PC screen and TV.
Meaning thereby that one can not forever changing.
Some wrote in their reviews here also that this has worked for them, so I decided to buy.
Unfortunately funktinoerte not with me.
The signal arrives, the lights also light up, but I suspect the "handshake" then no longer works, in any case came to an image when neither PC nor the TV.
Then thought, ok, I'll try at BDPlayer but also because it did not work. Therefore returned.
I do not know how it worked in others as I want to connect, I need a splitter no distributor / switch.
Therefore, as I said, unfortunately, back, only because of the function, not because of processing or so.