Canon hi8 No volume on playback

Nope. hi8 was newer technology. hi8 camcorder could play older 8mm videos but not vice-versa. hi8 video has higher resolution then older 8mm

Are you using the sony software to download and convert the video?

hi,
what is your camcoder ? HI8 or Digital 8 did you record all the tapes with same camcoder ?
what ever HI8 doesnt go on Digital 8 and vice versa

yes the format are different,Normally in Hi8 camera,it only play back in that camera that u had record.If I am not wrong .

Hi8 takes hi8 tapes. Your particular model will be the variable to determine playback options. It probably has some type of RCA out that would let you view it on a tv.

i am trying to make a claymation but there is no pause button please help

I believe all Sony model DCR-TRV2XX and 3XX would play Hi 8 and ST8
Such as DCR-TRV265, DCR-TRV285 DCR-TRV340, DCR-TRV355
I hope that give you some ideas

In playback mode the lCD displays the battery time, hi8 symbol and the tape counter. all the functions work the tape will play, rewind, fast forward. The screen stays blank on playback and the tape counter stays at 0:00:00 eventhough I can see the tape turning. I also hooke the camera to my tv and I got no picture.

What's happening is that the tape in the cassette is being chewed on one side by the camera's tape transporting mechanism during playback, hence the distorted image and sound. The mechanism might be damaged (misalignment) or just dirty. Try not to play other tapes on this unit because they will become permanently damaged. The best way is to find another camcorder (if cleaning does not help). Note that some old cassettes of long recording time will exhibit this behavior more often because of thinner tape used.

may be your camera not design to play the analog tape...there are some model that can playback a analog tape...i think your camera is for digital playback only.... check your user manual