其实,What'swrongwithyou?本身就是陈述语序.

　　英语中特殊疑问句不都是倒装语序,当疑问词在句中作【主语或主语的定语】时,特殊疑问句用陈述语序.所以,放到宾语从句时,句子不需要改变语序.

　　如Whoisstandingthere?who作主语,Idon'tknowwhoisstandingthere.

　　Whosefatherlikesmusic?whose作主语father的定语,Idon'tknowwhosefatherlikesmusic.

　　What'swrong?/What'sthematter?Whathappenedtoyou?都是疑问词作主语,句子都是陈述语序,所以,在宾语从句中都不需要改变语序.

　　而Whatareyourhobbies?疑问词作表语,句子是倒装语序,所以,在宾语从句中需要改变语序.

　　希望我的回答能够帮到你,