Starting to have trouble with the Family Room receiver. It's an Onkyo TX-NR509. Not quite 3 years old and having trouble with it sending a signal to the speakers. You have to turn it off and on several times before the speaker indicators light up on the LED display. This is the second receiver that I've had trouble with in this system. It is in a cabinet and does get about 6 hours of use a day. Do you think heat could be a factor? I just ordered a Yamaha RX-V475 as the Onkyo's replacement. It's the last model before the current model and was nicely discounted and it arrives on Sunday.