did you mean.GR-DVL9000 , year 1998 ,only 24years new? ???$1200 new, ouch,Wow TAPE machines still used with Mini MiniDV Cassette Tape 30 min, (DVM-30) M-DV30MEor DVM-60most are gone now to trash, due to horrible resolution.or about 480P grade 500 lines (horizontal) by 480 lines (vertical).but tapes make video noise so is not good.even cell phone does x10 better today. ok, put it into r attic, mines 110F now. for say 1hour.and it dries out,(summer here now)the cause is storing any thing like that in damp basement.the flying head will rip the tape to H3LL , if wet.so blocks you. VHS. has flying head.it will need to be dried out, first.(attic trick) or ? dismantled and blow out with hair dryer on low setttingor fully cleaned out. or eject or play or rec, will be dead.page 83 in your free manual (google finds it using the correct model you did not tell)"Moisture on the head drum can cause severedamage to the video tape, and can lead tointernal damage to the camcorder itself."if out side (are you ) or damp basement are you./the dew point reached the air is saturated with wateror 100% humidity, this happens.that is why we hate, VHS, see? why, they stink in bad weather.
https://www.libble.eu/jvc-gr-dvl9000/online-manual-693069/?page=70or tell the real model fully as 9000 is not complete.the sensor that detects, damp state is unknown.but in fact may be bad now 24 years later. and common.or needs IPA bath or better pure 100% alcohol.cleaning the actual inside sensor for damp.then dry it fully, using hair dryer on low. or attic dry it.then test again.end relic cam post.