Looks like you require a service repair. See this part of the Trouble Shooting Guide for my HT-E6730W; the North American version of what you have. You have 2 lasers; one for each disc type... looks like one of yours has s**t the bed.
Best of luck
I have a 3D Blu-Ray HT-E6750W player.
It has stopped reading DVD's all together. It will just make an unhealthy sounding clicking noise and then after a long while it will finally eject the DVD.
It will still play Blu-Ray and 3D discs okay.
What can I do to fix this? Not impressed.