only sound but no image (video & pictures) Panasonic HC-VX989

Hi,

my camcorder does not create images in any way. I can take pictures or record movies, but will only get black images (in case of movies black images with sound).
If I record movies, the additional lamp is permanently active.

I thought there might be a problem with the imaging sensor. What do you think? And is there a chance to purchase replacement an replace it on my own?

Thanks in advance!