Andy Eagle
Fractal Fanatic
I would guess the truss rod is loose and the neck has a huge amount of relief . That needs correcting first and it's not a beginner job because you need to feel the tension and judge how far you can go to get it almost straight.
He could just tune it up and fret on the 1st and 14th frets on the "G" and look at the gap at fret 7~9. He is lucky that he can adjust it at tension.
Go up in quarter turns until it is ballpark straight and then 1/8th turns to fine tune. If the neck is already straight it is just the bridge saddles but the picture suggests more. I would be surprised if it was twisted in any meaningful way. I think someone has loosed the truss rod who has no clue what they are doing. I think any tech could fix this in a few minutes .
He could just tune it up and fret on the 1st and 14th frets on the "G" and look at the gap at fret 7~9. He is lucky that he can adjust it at tension.
Go up in quarter turns until it is ballpark straight and then 1/8th turns to fine tune. If the neck is already straight it is just the bridge saddles but the picture suggests more. I would be surprised if it was twisted in any meaningful way. I think someone has loosed the truss rod who has no clue what they are doing. I think any tech could fix this in a few minutes .