Hello MaxS, thanks for contacting us through the Intel Communities.
This seems to be a cable issue, since the VGA monitor is working OK. It will be helpful to test the 29” TV using another HDMI cable. You could also try using VGA or DVI connexion if it has any of those video ports.
I would also recommend you to try our graphics driver version. You would be able to download it at the following link
Regards,