I, too, have a Fiio E17 (originally bought in June 2012) that does not work and was already fixed/replaced by the online retailer shortly after purchase. My issue appears to be with the L7 line out connector causing problems for the E17. On two separate occasions, with two separate, L7 cables, the E17 has lost functionality. Currently, the unit will charge, but will not power on. The reset button does nothing.
I contacted Fiio about a replacement under warranty. They were responsive and provided information on a replacement/fix. However, that involved sending the unit to China, at my expense, and sending a photograph of my ID to Fiio. I did not wish to do either and decided not to pour more money (shipping) or time in to this product.
When it worked, I liked the E17 and thought it was worth the money I spent on it. If I had it to do over gain though, I would not purchase the item. I also doubt I will purchase another Fiio product in the future.
Has anybody else experienced issues with the E17/L7 combination?