My Taylor 810 seems to be "buzzing" lately when I strum a deep chord like an open G, E. Sounds like its coming from inside the body.
What should my troubleshooting step be. The nearsest "reputable" Luthier is 30 miles away.[/QUOTE]
Buzzes can be VERY hard to track down. IT may sound like it's coming from inside the body, but could be coming from anywhere sometimes. It's a piece of woodworking meant to amplify and transmit sound so it's deceiving sometimes.
Check the simple things first.
Like a new set of strings. Sometimes the ball ends can rattle inside.
Still could be fret buzz, or even buzz from the nut. Capo it and strum the chord. Does it go away? Maybe the nut slots are cut too low and the strings rattle in the open position. Perhaps it is fret buzz.
Does it have a pickup in it? If so check and make sure that none of the wires are loose and near the top because as the top vibrates it will rattle them.
Could be the hardware on the tuners. Check the nuts, screws, washers on them and make sure they are nice and tight. Same for the hardware inside the guitar such as the bolts that hold on the neck, or the end jack if there is a pickup.
There is the chance of a loose brace rattling, or even a cracked brace, but these are more serious, and less likely scenarios.