Seen this on another forum.
Receiver Check | Customer Support | Onkyo USA Home Theater Products
Check Serial Number for Units Experiencing Shut Down/Static Noise
Attention Canadian residents! Visit Onkyo Canada to check your Serial Number.
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How did you purchase your unit?
Sudden Shut down and or Static Noise from speaker
Dear Valued Customers,
A limited number of ONKYO models manufactured during the months of November 2011, December 2011 and January 2012 may exhibit one of or both of the following defects:
• When powering on the unit, the unit will turn on then turn off automatically
• Static Noise emitted from speakers at low volume level
(The above mentioned defect(s) are not safety related)
Affected Models: TX-8255, TX-8050, HT-RC360, TX-SR309, TX-NR609, TX-NR709, TX-NR809, TX-NR1009, TX-NR5009, HT-S3400 (HT-R390), HT-S7409 (TX-NR609), HT-S8409 (TX-NR609)
Please follow these steps to see if you receiver needs this update.