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Old 02-06-2013, 09:48 AM   #1
purbeast0's Avatar
Join Date: Sep 2001
Posts: 41,824
Default HDMI video flickering out

this past weekend i had been playing my xbox360 for a good 3 hours or so when the screen flickered for a second black, then came back on. i was like wtf, and then it happened again like 2x in a row pretty much right after that. the whole time the sound was still playing.

so about 30 minutes later it happened again.

the following day was superbowl sunday and we watched the game for 4 hours or so straight with no flickering. i was then listening to some music on pandora on my receiver, and noticed it happened again. so this wasn't on the 360 input, it was on another one.

last night i was playing ps3 and this happened quite a bit, like 30 minutes in. it was frustrating as hell and i tried messing with some hdmi cables.

i currently have a 25' hdmi cable from my projector in the wall to a wall jack in a closet. from that wall jack i have another hdmi cable connected to my receiver. then i have a bunch of hdmi cables running to the other components. also, the 25' cable i'm using now is the same one that i had been using for a month or so before i did the in-wall wiring and never had this issue.

so i swapped the hdmi cable going from the wall jack to the avr, since i had seen this issue on 3 separate inputs. it seemed to fix the problem, but then i saw the flicker happen 2 more times. they didn't happen in succession like the previous ones did, but they happened.

i also tried using the other hdmi output on my receiver, with the original cable, and saw this issue as well.

so does anyone have any other suggestions on what to trouble shoot if i see this popping up again? luckily i did run another hdmi cable in the wall so last resort, i will take the faceplates off the walls and try plugging the other hdmi cable into the projector. but i kind of want to get rid of all other possibilities before i go that route.

has anyone heard of these HDMI wall jacks causing issues like this? also, could running my HDMI cables (the ones that go to the components and avr, not the in wall one) right along with the power cables that plug into the wall cause something like this? i always figured that if something was messed up with the hdmi cable, that the sound wouldn't come from the hdmi cable either.

or could this be caused from a heating issue? the first 2 days this happened it didn't happen for at least 3 hours of components being on, although last night it happened within an hour, so i'm not sure if that coudl be the culprit.


here is the actual hdmi cable i have in the wall between projector and avr.


Last edited by purbeast0; 02-06-2013 at 02:04 PM.
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Old 02-06-2013, 10:04 AM   #2
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it could be interference but i thought HDMI cables were shielded against that. Could be a bad inwall cable. Monoprice? if still have it after you swap the inwall one it may be worth it to go with one from blujeans or one of the readmear ones which are supposed to work better on longer runs

It could also be a simple handshake issue going from Cable to wallplate to cable,....
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Old 02-06-2013, 10:54 AM   #3
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yea i got a blue rigger cable that came recommended for in wall installations, and since it worked fine at least the month prior, i'm not sure why it would be messing up now just because it is in the wall.

and it definitely wouldn't be easy to just run another cable to the projector if my OTHER one was messed up too lol. i would probably have to cut another hole in my closet, just because the wires running through the 2x4 to go into the ceiling is not very large and it would be tough to just pull an hdmi cable through it.

Last edited by purbeast0; 02-06-2013 at 02:04 PM.
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Old 02-06-2013, 12:18 PM   #4
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When you start getting into longer HDMI runs, weird things can suddenly pop up. 25" is a bit short for such things if you're using a reasonably thick gauge cable but it is still a longer run. I have a 35" run that I used the thickest Monoprice cable available on for many months without any troubles. Then one day I started to get a lot of problems (frozen pictures). Unplugging and replugging the cable would generally fix things for an hour or so before the problem occurred again. I ended up buying a redmere cable from Monoprice and have had no troubles since. The only thing I can think of is that the original cable was right on the margin of acceptable signal strength and eventually something caused the signal to degrade just a very tiny bit (e.g. perhaps slightly loosened connections through use) which, of course, can be disastrous for a digital connection if you're already on the edge. Who knows.

If a longer run is a potential problem, one cheaper solution than a redmere cable is an inline extender like this:

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Old 02-06-2013, 12:30 PM   #5
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yeah if i can't figure out the problem, and my other HDMI cable that is already in the wall STILL causes a problem, then i will go that route of an extender. the last thing i want to do is run another cable in the wall, because that probably will require putting at least 1 more hole in the drywall.
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