Have an Onkyo a/v receiver, model tx-nr809, victim of lightning strike. When power cord is plugged in I hear one click about every two seconds. No other signs of life.

SOURCE: Onkyo - direct tv code for tx-ds 787

does anyone knows the code to control the onkyo TXDS 787 through the comcast.remote.?

SOURCE: Onkyo TX-SR 606 KEEPS CLICKING INSTEAD OF TURNING ON WHEN POWERED

Here are your options:

1. An electrical problem, where your receiver has a grounding problem.
2. Your speaker wire connections are actually touching each other and that's why your receiver is not turning on.

SOURCE: Powered Or Unpowered Subwoofers For Onkyo TX-8511

Greg- Powered subs are better than non-powered subs (also known as passive subs), anyway I see the TX-8511 has no sub pre-out on the back panel, so you need to decide what sub you will use and run from the receivers left and right speakers output into a subwoofers speaker in from speakers then back out to speakers, look at the back of a subwoofer and you will see like 4 sets of speaker hookups 2 in and 2 out, what this does is takes the low end or bass and drops the signal to the subwoofer then takes the mids and highs out to your left and right speakers, unless your regular left and right stereo speakers have large woofers a sub is the way to go.