Jammed by putting tape in upside down

DIY remove Hi8 tape stuck camcorder Check this link as it might help out to remove the cassette.

Try removing the battery and charging it. Then put the battery back on the camera. This will reset the cassette system. The cassette should open or close depending upon what status it is in. Once you get the camera to eject fully, clean your heads with a dry head cleaner cassette for Hi8 video. If your camera is still eating tape, could be a broken pin or damaged heads.

You can use capture card to record from your tape to computer.see the picture its look.

Tape can not be inserted backward in.It is impossible to to insert cassette inside video wrong way.
If it is not ejecting its eject switch might have got broken by physically pulling its cassette compartment outward before closing last time.
Its mini switch is very fragile in all sony models. so only way is to take to technician to bring it out.If i were you,I would buy used one from ebay at lower price than repairing.

There is a broken plastic part inside the cassette and needs to be replaced. Mostly due to cassette tape improper position and camera jam (tape jam).

To the best of my knowledge 8mm VTR's have not been available for some time now. On the other hand there are plenty of Hi8 cameras and players available after market. eBay is a great source. Keep in mind that Hi8 cameras and decks will also play standard 8mm video tapes.
There are also many video tape transfer services that will transfer your 8mm tapes to DVD or other formats of your choice. Just Google "videotape transfer service"

try using a smaller tapetime, the grinding noise your hearing is the gears of the tape take up within the casette not the camera, it seems the Sony tapes are 120mins long and the Sony tapes are heavier than TDK and your spool take up on the camera can't take it. the TDK tapes you were previously using may have been a shorter time than 120minute?...try any Hi 8 60min tapes instead. not the 120, they can be too heavy for the take up spool motor of the camera and all its doing is stretching and winding the cassette tape and unable to pull it with a 120 min cassette

a problem with an electro mechanical mode-select switch there could be a timing problem arised by mechanical problems on contacts inside (an old video recorder problem between the seventies and nineties ) all equipments where tapes or cassettes are used.
A service manual for timing should be neccesary
Sony CCD TRV16 Hi8 Handycam Camcorder Service Manual Page 13

DCR TRV140E is a Digital8 camera
CCD TRV87E is a Hi8 camera,
(Hi8 is an analog format)
the tapes are the same size, wont help, the recording systems are not compatible
send them to a lab service ?maybe if there are only a few
or ebay a Hi8 camera and transcode them yourself

its not a solution, at least it clarifies the problem

I also have this problem, with a SONY DCR-TRV480E PAL. The problem is when I insert the cassette it reads on screen that "re-insert the cassette"