Problems with recorded programmes?

Hi All.

My mums 9200 has had similar problems with picture freezing, problems with live pause and fast forwarding. She too resolved these with switching mains off and on. However these problems persisted, and she cannot view things she has already recorded. I have downloaded and installed loader and software updates in the hope of resolving all problems. All seems to work ok except i cannot access previously recorded. when selected all i get is a blank video list, but when i go to HDD it tell me that there is only 10GB free, so the recording must still be there. Has anyone got any ideas how to access theses recordings?