Neck bent (NOT RELIEF!) towards ceiling

Hi all,
This is my first time posting and I've googled this issue with no results. Everything I find has to do with relief, bow, or twist. Here is my problem: I have a bass guitar that has a neck that bends towards the ceiling. Again, I'm not speaking of neck relief. If you are playing the guitar, the headstock is bent towards the ceiling. I took a metal straight edge to it and the bend seems to occur around the 5th fret. The guitar is an Ibanez Roadstar II RB650. The problem doesn't affect playing much other than the strings not being perfectly aligned with the pickups and less space to play with a the E string. I love the way the guitar sounds and plays and would like to keep it for a long time so I'm posting to see if this is fixable. I have the guitar hanging on a neck hanger and was hoping that would do it but it hasn't, however, I haven't tried removing the truss rod and strings while hanging it though.
Thanks!

ludwigs3rd
What your describing seems awfully odd. I fear the truss rod is broken! Strongly suggest take it to a reputable repair shop for an assessment. Don't 'fuss' what it will cost. I had a full tune-up for only $35.
fingers

I don't think the truss rod is broken. I can tighten and loosen it and adjust the bow of the neck. It does seem like an odd situation doesn't it? I have searched online for months to no avail. So are you saying I shouldn't spend more than $35 for a full setup? I'm wondering if I should just get a replacement neck. I love the way this bass feels and sounds.