I would like to ask everybody for an advice.

The cassette housing assembly (cassette compartment)
of my Sony camcorder CCD-TVR15 (Video8-XR) can not
keep closing. When I press to close it, it will go
down and close normally, but it gently pops up again
after few seconds. The problem happens either
with or without inserting a tape. There is nothing
stuck inside.

Please advise me what's wrong with my camcorder and
how to fix it.

Thank you very much in advance.