how are you? I am ST8300 mono user, korea. My ST8300 mono ccd is repaired 3 years ago. At that time, it's board is replaced by STF-8300 board. Now it had similar problem when i connect to my computer, computer can not find CCD. when i power on it, LED / Pan / shutter check are Ok. I guess it happen by electric shock. It happen after DC power adapter short circuit. i try to contact repair center, and send e-mail last week. but reply not yet. how can i contact your repair center?