I'm terribly sorry if this isn't the correct place to post this, but I'm new, and this is my first post.
Recently I had my guitar's whammy bar stolen while in service at my local music shop. Because of this I decided that I would (try) service my guitars myself from then on.
My Jackson King V was originally in D standard with 10s, but I changed the strings to 12s, and tuned to C standard. The tension felt similar, but the intonation was slightly off. I was able to get all the strings perfectly intonated, save for the D# string. I plugged the guitar into a Hartke HT12, and used the harmonic/open string method to intonate the strings. All the strings are perfect, yet the D# is too sharp, even though the screw on the (tune-o-matic w/o stop tail) bridge is screwed fully away from the neck.
Could it be a truss-rod issue?
Thank you to whomever reads this.
P.S. I can't take my guitar to be serviced any time soon, even if I wanted, as I don't have enough money.
Truss rod wouldn't be affecting it. If it's a TOM bridge and you've cranked the screw all the way back, sounds as though you can't get the saddle to where it needs to be to intimate it. Especially if the d# is a wound string. I use 13-62 on my drop c guitar with a TOM bridge and I took the saddle for the 4th string and flipped it around to give me that extra 2mm travel to get the intonation bang on.
Without pics and a little more info it's kinda hard to offer any more advice. Also what tuner are you using to intonate?