Sirus onyx plus with home kit does not power up

Try a factory reset of the receiver.
To perform a factory reset, press and hold the MENU and SOURCE buttons until Factory Reset is displayed. Then Power Off from Back panel for 1 minute and power up normally.
You may have damaged the receiver if you did not power off before installing the Onyx module.

they aren't compatible. I had same problem. called siriusxm they said its not compatible even though its the same "universal" connector. they said the subx1 was pre merger. I say it shouldn't matter because they have same universal connection.

Typical Sirius junk - overheats and display goes out. Buy a new XM Onyx Plus radio instead.

You might have to contact customer service about this issue.

yes. Just plug in the antenna from the XT base into the Onyx base, plug in power and activate!

I had the same problem, Bought a new Onyx and tried the supplied 12v power cable on existing Onyx and it worked, So it appears to be the power cable, Hoping now I can find a new power cable,

TWIST OPEN THE END OF THE CIGARETTE LIGHTER ADAPTER AND YOU'LL FIND A GLASS FUSE IN IT.
BE CAREFUL THERE MIGHT BE A SPRING IN IT THAT HOLDS FUSE DONT LOOSE IT.

I had the same problem. If your radio is a kit and not factory installed in your vehicle it could be the magnetic antenna on top of your car. I had mine for about two years and from moving the radio around, or docking and undocking it, the wire from the antenna broke. It was not cut all the way through but it was enough to cause it to loose the signal. Check your antenna where it plugs into the back of the unit.

Carl- If you are sending a Line Level Audio signal to your ONKYO RECEVER, from your Sirus RCA cable Output, IE, the CD input, the VCR input, the AUX in, ETC. No Need to have the RECEIVER in the FM mode, you are just needing amplificaton of the sound signal or Sirus signal sound.

I had the same problem and I replaced my car antenna. That resulted in immediate signal improvement. But three months later, the same thing. So, another dot micro car antenna. Three months later, the signal went out again. The home kit worked perfectly. In my case, I bought a Sirius outdoor home antenna and replaced the standard indoor/outdoor antenna that came with the home kit. I took the home kit antenna and connected it to my S50 car kit and positioned the antenna on the front of the dash. No problems since then. Not one. Those dot antennas are horrible. I'd check that before getting a new radio.