Gearhead wrote
The offending fret might not be the one you are fretting being low, but a higher one having come loose and sitting up.
The alternative to swapping the string is to check the fret height with a short ruler (short so it takes out the effect of forward bow) but this does take experience to judge.
I tried measuring as you said, it seems to be identical heights between the frets. If a fret comes loose and sits up, how loose is it? ie. would I be able to move it at all?
Alan Ratcliffe wrote
First thing you do is try another string, which is often the culprit with sudden problems. And GH is right - more likely to be the 14th fret being high than the 13th low.
The thing is, This became apparent to me one night before I did my mods on my guitar, even with the old strings on. I finished my mods, put on new strings and all, and spent some considerable time on the setup. Nothing seems to make a difference.
It seems there is actually more buzz than I thought on my higher frets (higher than 12th fret) which I've been told is truss-rod territory. What should the practical settings be, as opposed to what Fender uses as their standards?