LOL - I gave that up a while ago. Had the same problem, no LCD screen. I even had a local radio shop that claimed to be able to do it before give it a try, with no luck (on my Alpine CDA-9855). I think these new screens need too much juice and the long connection can't do it.
I bought an XM radio (XM Direct) instead, and am so glad I did. SOOOOO much better.