Also try connecting the camera to a tv threw the s-video or the composite connectors (yellow =video, white = left audio, red = right audio).
Just make sure the camera is still working fine too, you will need to select the connector you are using on the t.v , the av select it is normally called or input selctor.
Just try that too , so we can rule out the camera here , you should get a picture on the t.v.
Regards
Nabil
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