gpu hdmi not working

Nov 10, 2018
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hello, I'm writing this because I have a problem to connect three 43-poles 1920x1080 pixels and also a low-profile monitor together.
now the problem that happens is following, I bought a new GPU to be installed to have a multi-monitor system, but practically
nothing works! in the sense that, when I connect the PC monitor both on the VGA port and both DVI port both work, if instead I connect the HDMI with the three tv connected together via an HDMI splitter then it does not work in the HDMI port and goes off even the pc monitor !!! and I've done this with three different cards that I've tried until now.
the g710 the g210 and also with the Quadro 2000 below I leave the link of the cards

GeForce 710 inno3d g210 Quadro 2000 and the pc with which I tested is the hp 7800 and also the Fujitsu D3162-A
Now I tried to connect one of the tvs on the HDMI port of my laptop and it works well and I also tried it directly on the VGA port and also the display port via an adapter on the Fujitsu D3162-A and work well, if instead, I connect one of the cards to the HDMI port of the cards does not work !!!
which could be the problem ??? and also turns off the PC monitor, and it happens with both PCs the same thing !!! please help