Thanks for the link!
But the AC INLET on the Onkyo TX-NR905 got a 2 prong. I was not able to find a 2 prong AC INLET for this receiver. I will have to continue looking.
Even if I find the correct AC INLET, I don't know how to replace it anyway. I may have to send it to Onkyo and pay big money to replace the AC INLET. I called Onkyo and they told me it will cost about $370 to have that AC INLET replace.