My 1 1/2 year old Tx-R2779 has been emitted a very loud, high pitched squeal for the last month or two. It just started to this recently and only did it every once and a while. Now it does it after the TV has been on for more than 5 min.
Get a small wood/plastic stick and touch the different coils/transformers to see which one is the cause. Replace part or if the part doesn't run hot, use a small amount of hot melt to quiet. Don't completely encapsulate in glue, don't want to create any hazards.
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its your secondary air pump. it turns on in the cold morning to inject more air into your exhaust, something about emission. its normal to be high pitched. once on my car it was way loud, i looked and the hose had disconnected. either way its normal if its not super loud. but if its everyone is looking at me loud then check for loose hoses!
If the sound is from the compressor, the unit is likely under warranty...generally 5 years. If the unit is frozen up and the sound is from a fan that is hitting ice, defrost the unit completely. Other fans in the unit could also be squealing. You'll have to be a detective.
THANK YOU Guest (4/10/08)!!! That was exactly what I needed! We have had our system for 4.5 years and suddenly, the FM feedback on everything, but DVD and Radio! Your fix helped. Once I set all my presets (at least the current one) to a clear station, the feedback stopped. Hallelujah!! We can enjoy this piece of junk once again! ;) Amanda - San Antonio, TX