My Ibanez Artcore's strings are buzzing towards the top of the neck (1st fret). I have tried raising the action but the strings are very high off the fret towards the 20th fret and I still get some buzzing. Do I need to adjust the truss rod to fix this or is the neck tilted upward normal? I'm replacing the string later today.
It sounds like the truss rod could be the solution. If you add a little relief, that would tend to scoop the 2nd fret a little lower w.r.t the string path from the first fret to the saddle. But also check that the frets are level and the nut height is ok. It could be a high 2nd fret or a low nut.
The neck angle isn't necessarily an issue unless you're up against the limits of less extreme adjustments.