Problem with Denon 1913, Smasung Blu Ray Player, and Sony Bravia Tv

Alright everyone. I apologize beforehand for being long. Need some help. Been with this for over a week. Helped a buddy relocate his devices into a closet from his living room. We hung the television, installed in wall lcr's and in ceiling surrounds. We also installed a pair of outdoor speakers from the 2nd zone of the Denon 1913 that he bought. Devices were the Denon 1913, dish cable box, and samsung blu ray player. Okay we ran cat 5 for the HDMI Balun and the Ir kit. Now everything was viewing good, but then after 30 mins or so the image from either watching cable/sat or blu ray would go away. Then just pushing the setup button it would come back. That's 1. 2. When we would turn a light switch on or off it would cause interference. We've heard of this but we made sure to keep the wires run at least 8-12 feet away from any electrical wires. Okay so we messed with the settings to see if first we could solve the problem of the image going away but nothing worked. Okay next we decided to go ahead and run an hdmi cable instead of using the cat 5. The distance was under 50 ft and the cable was 50 ft. I know it is not recommended to use at this distance but we wanted to rule everything out. So next thing the cable/sat box running through the receiver began to show without going out and then the problem with the switch interference also went away. So we thought problem figured....but nope. Now the blu ray player wouldn't show running through the receiver or connecting direct to the tv. Now at times we would be able to hear it, but atr others it wouldn't. Ok we tried the ps3. Connecting the ps3 through the receiver it would show the movie but then get fuzzy and then show and fuzzy and continued. Ran the cable direct and viewed perfect. So then we tried a repeater/booster. Im trying to make it short, so sorry. The repeater did not improve the samsung blu ray, but the ps3 worked great and did not do those problems as without it. We tried everything in the settings and customer service had no answers. This has really had us stumped. Now do you recommend maybe using a single line hdmi balun or what do you all recommend? Has anyone ever experienced the same things?

Would appreciate any help we can get.

Thanks,

jorge

The messed up thing is that we have 2 buddies that one had 1912 and the other a 1913 and they did the same thing. They were working perfectly before. And continued to do so when they took them back. We automatically thought the same thing. But was not the case. Now my buddy had a cheap samsung receiver that he used before and everything worked well.