dgbrown Posted February 21, 2012 Share Posted February 21, 2012 Looking for ideas ...I'm in the process of testing the new snap hdmi matrix switch. At first blush it was pretty much plug and play. However, come night fall I'm finding the dimmer/recessed can lights are causing interference that causes the signal to drop out to a black screen. The dimmer in question is part of a 3 gang jbox all running off the same circuit. I'm suspecting a ground issue or perhaps a wiring issue (reversed polarity in one of the can lights that the dimmer in question is controlling?).I have not tried ground lifting the TV yet.Details follow - If anyone has any ideas or suggestions let'm fly ....Thanks in advance !In the rack all connected with HDMI -Moto STBMoto DVRDuneSnap HDMI MatrixAll on APC UPSTest Room4 Recessed Incandescent Can Lights3 gang switch (Gang 1 - Dimmer: the above 4 light cans, Gang 2 - Switch: Cieling Fan, Gang 3 - Dimmer: 2 recessed cans)Pani Plasma - With 3 prong blugSnap Powered One Cat Balun (two prong plug) - Connected via Cat5E (inwall)Test 11080P Video Passes FineGang 1 - Dimmer operation causes black out for A/VTest 2Snap Powered One Cat Balun - Connected via pre-terminated Cat6 temp run1080P Video Passes FineGang 1 - Dimmer operation causes black out for A/VTest 3Snap Powered One Cat Balun - Connected via pre-terminated Cat6 temp runPowered Balun from another circuit1080P Video Passes FineGang 1 - Dimmer operation causes black out for A/VTest 4Snap Powered One Cat Balun - Connected via pre-terminated Cat6 temp runRemoved 2 of 4 incandescent floods1080P Video Passes FineGang 1 - Dimmer operation causes flicker of A/V at power onTest 5Theorizing that perhaps this was load related:Snap Powered One Cat Balun - Connected via pre-terminated Cat6 temp runReplaced 4 incandescent floods with Cree 18w LED flood replacements1080P Video Passes FineGang 1 - Dimmer operation 95% of the time a/v passes fine. The other 5% - very intermittent drops when operating the dimmer ramp.Test 6Moved Balun and another TV to new location that had recessed incandescent floods and C4 dimmer.Snap Powered One Cat Balun - Connected via Cat5E (in wall)1080P Video Passes FineDimmer operation in new location has no effect on A/V. Link to comment Share on other sites More sharing options...
LSDave Posted February 21, 2012 Share Posted February 21, 2012 great test results. I've noticed that when i've had black outs on HDMI extenders, Equalizers don't seem to make a difference, but when experiencing other signal issues the HDMI EQ seems to clean it up. I'm wondering if an EQ would help your situation out. Link to comment Share on other sites More sharing options...
dgbrown Posted February 21, 2012 Author Share Posted February 21, 2012 Thanks LSDave. Is there a particular brand/model that you've used ? Link to comment Share on other sites More sharing options...
dgbrown Posted February 22, 2012 Author Share Posted February 22, 2012 Any other ideas as to why a dimmer for recessed can lighting would cause a balun to black out ? Link to comment Share on other sites More sharing options...
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