When opening camera to insert tape,tape tray slides out,does not

If you mean Sony CCD-TRV128 they have been obsolete for a good length of time now.
The main issue with these, back 20 years ago, was the door catch.
It gets bent from misalignment or forcing the door closed. Sometimes it can be fixed but often as it is so old, spares are no longer available.

you are prohibited from recording on thips tape. This is because the red tab on the side of the tape that faces you when you are inserting the tape inside the camera has been put in 'SAVE' position . to be able to record o the tape you need to use your fingernail to slide the red tab to the 'REC' position.

to help you understand this issue:
Tape and recording protection
The write-protect switch (right) prevents accidental erasure. .
To prevent the recording on the tape from being erased, there is a small write-protect tab that can be moved to one of two positions, labeled "REC" and "SAVE". Comparing the sliding tab to a door, the tape is in the "REC" position is when the "door" is open and the "SAVE" position when it is closed. (Not all tape cases have markings for this information!) The tape can only be recorded on (or recorded over) when this tab is in the "REC" position. This is an improved version of the VHS write-protect tab, which prevents erasure after it has been (permanently) broken off.

It sounds like something has jammed the tape door mechanism preventing it from opening. This is a very delicate part of a mini DV camcorder. I would highly recommend taking it to a electronics repair shop where it can be checked out. If you try and force the tape out you will probably cause considerable damage to the tape transport system making your camcorder unusable.

Take Care,

I have a sony cam myself. If the cam is empty, you open the outer door(swings out), and the load/unload mechanism rises up and pops open allowing tape insertion. When a cassette is placed into the mechanism, you press where it says "push" and then the drive pulls the tape down and into the unit. Then the outer door is closed and you're ready to tape. IF YOU PUSH DOWN ON THE TAPE WHILE IT'S BEING PULLED INTO THE UNIT IT WILL STRIP GEARS INSIDE. The gears are made of nylon to prevent serious damage to motors and other circuitry. This transport setup cannot be forced at all. If any type of mis-alignment occurs, the mechanism is supposed to stop and back up--allowing the problem to be corrected. If it is damaged, the cam must be repaired. There is critical timing involved in replacing the tape carriage.---Rick

I am assuming that the packing tape is still on the printer. lift the printer cover so you can see the ink tanks. there may be some tape holding the CD tray insert in place while it was in transport.if not then try and see what is blocking the tray insert.

Try toggling the opening hatch, tricking the machine into thinking it's being opened and closed...

I found a temporary solution for this problem. When the tray with the cassette tape comes out remove the battery so that the tray will not go inside again. Now on top of the tray it will be written as "PRESS" just adjucent to it you can see a spring connected to the tray just press the string down wards and the tray opens and you can replace the battery. Hope this can help.

In case anybody read this....     I have a GS-36 that would not eject the tape. I removed all the screws from the bottom and pulled the bottom plate off. Then I fidgeted with the mechanism near the eject button towards the front of the camera.  In my case it had just become stuck and needed to be gently pried open.    Tested it a bunch of times with tape - seems to be o.k.!

there should be a 800 number to call 1-800-555-1212 as the operator for a the number support JVC. you can go to there site www.jvc.com (i think)there you can find a local support repair shop. you can a chance open look inside real hard to see if something pop out of place in it. i know it stick a lot, me and my aunt have both JVC Camcorders my is a older model her's is a newer one. i would seek out a support center who work on them, seek out JVC and see if there a local repair center in your area

The most frequent cause of this type situation is not having a power source attached, or a depleted battery pack. Once the power source is available, some models require manually unlatching and opening the cassette compartment cover. When the cover is fully open, the videocassette will eject automatically. Please try the following procedures. 1. Attach the power source to the camcorder correctly or use a fully-charged battery pack. 2. Fully-open the cassette compartment cover until it stops while sliding and holding the OPEN/EJECT switch. The videocassette will eject automatically after a few seconds. If the videocassette still will not eject, seek assistance from a Canon Service Facility.