unbalanced

It seems that the DNA 200 board in my LAVABOX is discharging Cell 3 (likely an issue with the charging section). Any LiPo I put in her (the 900 mAh and two different 1,300 mAh) has cell 3 down to ~3.7V after 3-4 days while cells 1 and 2 are still at 4.18. Since I'm past the manufacturer's 90 day...