ST2000XM Light Frame Issues

I have been experiencing issues with my ST2K which seems to be unable to read most of its pixels, reading alternating vertical strips of data. I have attached a light frame for reference, which is a 10 second exposure taken with white light shining right into the sensor. Normally, this should give full saturation across the whole, although it is clearly evident that only certain areas are getting/reading the light. Any advice on what is causing this problem? I have tried different cables, and my ST8300M doesn't experience this issue so the problem seems to be with the camera. Thanks!