I'm new to playing acoustic guitar. Bought my guitar from a friend already put together so I didn't put the strings in myself so I don't really understand the inner workings of the guitar. I have a Yamaha F325 acoustic guitar. Everything was tuned up fine and then I started messing around with it. I tuned the D string really low and then when I tried to tune it back up to a D it had way more tension than before and when I pluck any of the strings they like vibrate on the frets or something and make a really annoying noise. Don't really know how to fix this, wasn't doing any of this before. What should I do? If you need more information I can take a video of what it's doing.
Last edited by Jonty999 at Sep 22, 2015,
Figured it out. A screw was loose and causing the tuning nob to vibrate.