The error message in the title of this post doesn't match what you've put in the body of the post, which is a bit confusing.
If you're getting NO DISC on all Blu-ray discs it sounds to me like your player needs to be looked at by a service agent. Before you take it anywhere though, it's probably worth spending a few pounds on a DVD lens cleaning disc and play that in the machine, just in case the error is down to it being unable to recognise discs due to a build-up of dust on the laser assembly. If it doesn't fix the problem you can always use the cleaning disc on the repaired/replacement player.
