I'm having intonation trouble on my LP Standard (Epiphone) on the high pitched E. Basically, once i get to around the 9th fret and upwards it's starting to go a little bit flatter and flatter.
Are there any ways that anyone could recommend for me, myself to fix it? I would take it into the shop for an engineer to have a look but I'm on quite a tight schedule and have a gig next Saturday.
Thanks in advance,