I have the same thing happening when there is a short electrical loss lasting only a few seconds. My cable box will reset and the display will come on but the 886 won't work. So I removed the power plug from the back of the 886 and everything works fine. This has happened only a couple of times but I'm glad the solution is so simple.
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SAMSUNG 5265/ ONKYO PRO PR-SC886/ FRONT SPEAKERS DEF TECH MYTHOS 1'S/ CENTER DEF TECH MYTHOS 9/ SURROUNDS ENERGY C20'S/ OPPO BDP-83/ OUTLAW 7700 POWER AMP/ VERIZON HI DEF DVR.TWO UBER 10 INCH SUBS FROM ORB AUDIO