I just got the X1100W, although I can't seem to get it to play nice. It might be broken. Just FYI it is a Demo model I got from the store, although it has full warranty.
I have a Philips 49PUS7909 TV which is connected through HDMI via the Monitor ARC connector. Sound plays fine the first 30 seconds or so, then it starts cutting out every 5-10 seconds. If I try pausing or switching to a YouTube video, most of the time the X1100W just stops playing anything.
Looking at the display the PCM indicator flickers when the sound cuts out and disappears eventually.
I also tried playing sound through bluetooth on my Nexus 5 to the X1100W. There it is almost the same story. Plays fine to begin with, then it starts cutting out and eventually it just stops playing entirely.
If I try playing something using the FM Tuner, it plays for 2-3 seconds then stops. A little while later it starts playing again and then stops again, then it is dead until I change channel or input.
I have tried resetting the receiver pressing the two leftmost buttons under the display. The first time I did that it showed me the Setup Guide which immediately turned black. Later I tried resetting the receiver 5-6 times in a row and I could get through the setup guide. However, the audio issues persist.
If I check if there is any firmware update on the receiver it tells me that it has the newest.
Any ideas before I return it?