I have a sony camera and had this a few months back - could take a photo and when I went into the photo`s to view could see the photo taken but all the while the screen was black when trying to take the photo
I didn`t know what to do and was near giving up and kept pressing different buttons - left in off over night and tried in the morning plugging into the usb cable and the camera as I would to download the photos and it just came back on
So I can`t tell you exactly what did it but there is hope and it`s worked perfectly since

Hope you get sorted
Suzanne x