I have an MZ-N505 MD, its great. lately, the track forward and the volume+ buttons act up; ie: track forward goes back, volume+ acts as the group button. Im pretty surprised; alot of people have had this problem. anyway, I used that n505/n707 hack to get into service mode, and I was wondering if there was any way to get my buttons to work again through that? if not, then how else would I get my buttons to work?