Replying to Fucked up camera

ok i went skiing today and got some decent footy. after we were done taping for a while we watched it and it was working fine. later i videoed for a little while more. i wnet to watch the footy from the whole day and the footy from the first section of filming and from 2 days ago wouldnt work...the screen was all blue like it normally is whn nothing is playing but it was supposed to be playin and it had the little green triangle for play on the screen. the shit from later in the day worked fine and the stuff from 2 weeks ago work fine but everything else ws just blue. is there anyway i can get it to work again and still have my footy. if it helps i have a jvc (not sure waht model) and it take mini dv tapes