Worked for me without an external power source

I bought this adapter to be able to play on my computer monitor PS3 and be able to connect my computer screen via HDMI to your PC.
On top of this adapter only worked on the PS.
The picture on the PS was not good.
One saw streaks, slight flickering, scrolling was not okay and overexposed in dark background.

On the PC does nothing worked until I read the reviews and an external power source have connected.
The image was OK but did not meet the full screen.

So I got in touch with CSL Computer.
It was written to me that the product was probably broken.
I returned it.
I did not order it again, the interest was gone.

Perhaps the adapter works well if he's alright.
For me it does not work properly in any case.