Digital Video Output

I have had and used this camera for almost 4 yrs., though not heavily. It has been used mostly for pass-through of analog to DV for DVD archiving. I recently captured an hour of recorded video with no problems. The next night, I tried another hour of recorded video and while the audio is OK, the video during capture is dark, almost black. Playback of captured video has exactly the same appearance as during capturing. I use the i.Link but the same happens when using the USB streaming. Analog output to a TV is fine. I have tried another i.Link with the same results. Sony wants only $211.00 flat rate service. Thanks, Cyco