My Nikon D70 is taking real weird photos suddenly! Several years ago I had it converted to be an Infrared camera and it has taken excellent photos up until a few days ago. All the photos looked good in the camera but when I downloaded the photos to my computer the same photos had color bands, offset parts of the photo in bands, multiple exposures in small pieces on a single photo. The last good photo was on 3-31-2021 and the 2 bad photos were taken on 4-3-2021. I've changed memory cards with no change in the results. I also have taken a lot of photos to exercise the shutter mechanism in case it was sticking from not being used since last fall but no changes happened - all the photos looked good in the D70's monitor and they all looked horrible transferred to my computer. Does anyone have any suggestions on getting this fixed or even what the cause of this is?