Blank radio display

I recently removed a cd changer that I installed a few yrs back on the 00 Accord EX. Problem is, when I turn the ignition key, the radio (stock CD) lights up, but is completely blank...no codes..no errors...nothing.

I can't turn it off/on, but it will accept (and eject) cds, of course they won't play.

I have not altered the stock wiring harness at all.

Any thoughts??

Is the shorting plug installed in the back of the radio?