Has anyone tried using an HDMI "equalizer" before or after the AVR to resolve sparkles? These units are supposed to do just that, and are reasonably affordable (<$50). They are made to improve signal over long HDMI runs.
Also, FWIW, my theory on the sparkles, since they are hit or miss across the same hardware rev is a manufacturing issue (duh), I am guessing a chip responsible for passthrough video has insufficient grease on the heat sink. This would result in overheating (remedied with added airflow) and fortunately, could be easily repaired.
Does anyone know their way around inside this unit, or better yet, have access to a repair guide or schematics?
If I knew which chip(s) the 1080p video flowed through I could try enhancing the heat sink with either A) More, better grease for better thermal transfer, B) A SMALL internal fan just above the heat sink, or C) A better heat sink.
(Edited for grammar)