Unusable (does not seem to amplify the signal)

I bought this Etekcity matrix 4 in / 2 out, so I already use a splitter HDMI 1 input / 2 simultaneous outputs HDElite mark (thirty euros on Amazon. Would recommend), which comes out to a particular cable Seiki U-Vision "active" (purchased sixty euros on Amazon ,. Again ,, product highly recommendable for image enhancement it brings)

After reconnecting all the cables to the new matrix, I get, not a black screen, but a display for 1/2 second image, then the screen off again in search of resolution.
I tried with an Active HD cable HD Elite (same principle as the U-Vision: cable chip Marseille image enhancement, powered by USB), which of course works perfectly out of my splitter current. The same negative result yet: the image remains only 1/2 second, then landed. (This means is that it is not related to a problem of non-recognition of the HDMI signal and negotiation)
Just in case, I also exchanged the AC adapter from my splitter -if ,, was failing for the same admission of failure.

This matrix is ​​simply unusable

The power of the case gives the impression be used only IR remote sensor, and not to amplify the HDMI signal switched (as does, for example, my splitter or HDMI matrix respectable). This amplification default so causes instability of the signal, limiting this "matrix" to a role of mere remote switch, for links (very) short - and I thought I noticed, generating a small shift of sound)
I do not recommend this product, which I will seek reimbursement from Amazon.