Canon Community

I've sent my 5DS in to get fixed as it constantly comes up with a blinking ERR message on the LCD screen....WITH NO CODE! The tech can not find anything wrong with it, yet I've sent it back with the same error twice. Apparently he has never seen this...

Recently my 70-200mm lens  has had an issue with focusing on the right hand side. Photos come out like it has motion blur, and I can see it through the lens. Photo is attached to show what is happening (girl in purple). Any ideas on why? And if I can...