BigSister

Hello, I've had two high end devices with DNA 60s go dead in the last two weeks. Hadn't made any changes, in the middle of the battery and coil cycle, when all of a sudden the screen went dead and they wouldn't fire. I've tried every combo I can think of to wake them up but nothing is working. I've read other posts on this forum of this happening but can't find them. Wondering if there was ever a resolution?