My friend who plays bass gave me his bass to change the strings. He dropped it off and I found out he took all the strings off at once, which I know for a fact you're not supposed to do. I've heard this causes really bad problems, but how bad really is his neck messed up now?
it should be fine if it's a fairly new bass..
not very. it will take a bit of action switching, but as long as he's diligent it should be normal soon.
Thank God, I was freaking out. It's a new bass, he got it about 4 months ago.
Probably nothing serious, might have to adjust the truss rod.
Going from full tension to none for an extended period isn't good, but worse things can happen. Just string her up and get it back to playing shape.
OMG his bass is F'n screwed man!!
Its not damaged. But its not a good habit for him to get into either. A bass has quite a bit of tension on the neck, and its released when you do this. I'd change my strings one at a time, unless I was cleaning or oiling the fretboard or something. In that case I would slacken the truss a little so the neck isn't forced into a backbow.