I'm sitting here one day glancing at the HD DVD collection that I have not looked at in a month of Sundays. I get the nerve to attach the HD XA1 to my Q6FN. I fire up the Matrix ,look at the TV and all i see is "No signal detected"
The player is working from looking at the display on HD XA1. I unhook that and attach my Toshiba HD-A2. fire it up and lookat the TV and "No Signal detected" .got me unnerved for a little bit. Cursing Samsung 
. I get the LG BH100 ,hook it up and there is a picture and audio 
. I try another disc and it does not load at all "disc error" on the BH100. Can't be mad at Samsung for that one 
. I give up and leave it alone for a few days ,but start searching hdmi connection issues on Samsung QLED's. Days later I try again hooking the HD A2 to HDMi on the HDMI switcher that also has the Nvidia Shield and Xbox One X. I actually get video form the HD-A2 ,But not a shred of sound . I disconnect the soundbar HDMI arc and try the optical cable. Not happening 
Then I remember something from some internet posts and start disconnecting stuff. attach only the HD-A2 and reset the TV,this time HDMI is connected directly to HDMI port 1 on TV. The TV recognized a signal ,Then Video and Audio came through from the HD DVD disc in player. It did not last as every disc errored out at some point for the HD-A2 . 
I got too lazy to even try the HD XA1 again. The BH100 is not reliable. I do have a LG BH200 attached to my other TV (Samsung Plasma) that tend to play without issues. Just not entthused to unhook from the plasma then to QLED. I just wanted to see HD DVD on QLED. The players are just stating to reach end of life 
