just an update, has not gone to sleep again on me,seems to be working fine? have let my LFS know. which my other half works at. simple answer anymore problems bring it back and exchange. I do have one gripe about the FX5, mine came with nothing but foam, you would think for that money you would at least get BIO BALLS. I'm used to the AQUA 1's where you get 2 foam pads, bio balls, ceramic noodles and a polishing pad!