True, it's difficult to diagnose a guitar prob' without taking a look in person. However, after reading your explanation, it sounds like something fairly common that we see all the time here.

Extreme 'buzzing' from a PARTICULAR fret (or 2 or 3 of them), especially in the SAME AREA of the neck is likely due to a "lifting" fret, or your upper register needs to be LEVELED/RECROWNED.

ONLY TAKE YOUR INSTRUMENT TO A QUALIFIED/EXPERIENCED TECH' if you suspect [this problem] or if that's what turns out to be. A poor fret re-crown could screw-up your axe so it may never be the same again!

Before frets EVER "go-under-the-knife" they MUST be checked to see if ANY OF THEM are lifting from the fingerboard. They sometimes have to be "tapped-in", re-seated, even removed and/or re-glued (some frets are even glued into the fretboard).

If you're not experienced, DON'T ATTEMPT TO FILE A FRET BY YOURSELF!

There are several things that effect the 'action' and effect the amount of 'buzzing' that occurs, such as; neck adjustment (truss rod issues), neck-"tilt" (or PITCH as it's sometimes refered to), bridge height, fret leveling, string guage, (Even a BENT or damaged string!), etc, etc...

HOPE THAT HELPS, BRO'!

GOOD LUCK! ;)


~JSV