Hi, I have a Onkyo CR-515 cd receiver. I don't understand why did the standby indicator fail to light up immediately when I power on. It came on only after a long while. And when it has lighted up, I could not turn on the player when I pressed the standby button. It stayed at the standby mode. May I know what could be the issues? Thank you!

SOURCE: Black Screen / Computer Stays in Standby Mode

Completely remove the battery and unplug the power cord for a few minutes. Reinsert battery and power up. You can also hit F8 when starting and see if you can boot into safe mode.

SOURCE: power works but receiver will not stay on

The outputs are blown and will require repair.

SOURCE: Wii Power, Wii Goes Dead when I press Power or Eject Button or Remote Power Button. Is THIS AN INTERNAL DAMAGE

According to Nintendo u can try this. 1. push the reset button and if that doesn't work unplug all cords and memory cards (including sd) from wii and unplug av from the wii and the outlet in wall. Wait 2-3 min and then plug it back in. Thats as far as i got because that fixed my problem hope this helps someone!!!

SOURCE: standby light on pioneer vsx-d308 receiver

I have the same problem. my sandby light is on but my receiver will not turn on! I checked my power going into the power supply board that was good. But i do not have power going to the transformer or the receptacle. And both of my fuses r good. check ur fuses and go from there . If u know how to get a power supply. please let me know.

SOURCE: Remote control via RI terminal on Onkyo Receiver

Not sure I can solve, but maybe help. I am having a similiar problem. However, make sure you Analog Audio (RCA type) cable are connected even if using Digital connection between the two. They use those cable to send the Commands (Mentioned in the documentation).
If you did get yours to work, please give me a hint... I upgraded mine from a 603 to a 701 and haven't been able to get it to work since.