It's probably died. Can you borrow another to verify whether it's dead or if there is a more deep seated problem? If you have two devices on your system try swapping them around but don't forget to change the slave/master settings.
This thread is now locked and can not be replied to.
Best phone camera 2016/2017: Galaxy S7 vs iPhone 7 vs Google Pixel vs HTC 10 Evo vs OnePlus 3T vs…
1995-2015: How technology has changed the world in 20 years
The Pantone Colour of the Year 2017 is Green
Super Mario Run preview | Hands-on first impressions of Super Mario Run: Mario's iPhone & iPad…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.