Originally Posted by netjack
I have a situation that I'm hoping someone can provide some guidance/resolution on:
I'm using both HDMI outputs on my 685 depending on whether it's daylight or night time (connected to my LG B8, the 2 HDMI inputs have different brightness configuration). My problem is that I've noticed intermittent bright sparkles on a dark image. If I switch to a different HDMI output (same source - Apple Tv), they go away. It can't be the cables because A) it happens regardless of whether I start on one input/output or the other and B) when toggling, why would the effect go away? But the cables I'm using are high quality Monoprice 18 Gbps 6'. Once I do toggle, the effect is gone for good until I start the tv up all over again in the next viewing session.
Sparkles indicates a borderline HDMI signal level. It can even differ day to day and seem fine some days yet not others so it can be a real bear to diagnose.
Different devices have different signal strengths, heck sometimes even different HDMI ports on the same device can differ
, plus long thin wires are sometimes an issue.
-try a different output port
-try a different input port
-try a different device
-try a different, thicker AWG wire [don't be fooled by the insulation thickness. You need to research what the actual AWG is]
-try a different length wire (shorter the better)
-try an in line booster amp
-try a "self amplified" HDMI cable. Monoprice used to call them "Redmere series" when they were first released but I don't know what they are called these days.