My Onkyo TX NR609 is not coming on and immediately shuts off and is progressively getting worse it is hooked to a harmony smart hub

HDMI

https://www.intl.onkyo.com/downloads/product_info/pdf/tx-sr803_ex_leaflet.pdf

https://www.fullspecs.net/smart-tv/insignia/ns-65f501na22-specifications/

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It sounds like the amplifier is overheating, check if fans are working and clean dust from heatsinks

Your receiver will play a single speaker under normal circumstances. Is this a new receiver?

You didn't say if you were using their wireless "dongle" or an ethernet connection. If ethernet try to connect another device - laptop, blu-ray or etc to see if you're getting a good modem signal. You might try re-setting the ethernet connection on your 609.

I'm assuming your audio is working, Onkyo had a lot of trouble with their HDMI cards, for some reason the defect usually took out the audio and ability to connect to the web.

Onkyo had a recall on 609s and they will repair the defect, free of charge or shipping. (In a range of serial numbers that, unfortunately, I do not know.) I took mine to a local repair shop and they told me it was recalled. It was about a year out of warranty but they fixed it.

Check where wiring plugs into receiver

check this link for information on Onkyo receivers

Hi try disconnecting all of your speakers (check speaker terminals ,all your wire,speakers as they may be cousin short)and turn on the receiver. If it shows the same problem try factory reset shown in the link below ,if that don't work then it mite be some hardware problem and you should contact your local service .Hope it helps. https://www.youtube.com/watch?v=gfJEw-VlpWY

If your TV doesn't support audio return channel (ARC, which is your TV audio routed back to the receiver through the same HDMI cable), you then need to connect your television audio-out to your Onkyo TV audio input, using a digital cable or an analog one according to the connections on the back of your TV. If you use a digital connection (optical or coaxial), make sure you have the proper digital port assigned to TV on the onkyo I/O assign menu/digital inputs.
In case your TV does support ARC, you need to activate it in the Onkyo's hardware/HDMI setup menu, either by turning on HDMI control (tv or receiver control each other via cable), or by turning ARC on (you'd probably need to activate ARC on your TV as well).
Hope this help,
M G

This is the same problem i've had with my POS nr609. I will never buy Onkyo again.. Everyone warned me about the poor quality.. This thing worked for a year and a half, blew the amp., replaced and now another year and a half, f'd again. Save your time, buy a Denon or a Harmon Kardon. Better quality, same features.. Boat anchor here

The harmony 900 should simply be used as a replacement for your onkyo 729E remote, there's no "hookup" involved, just program the 900E for the DS-A3 dock.
If you want to know how to hook up your DS-A3 to your stereo/TV, that would be a different issue.