I have an old Magnavox VCR (model VR9640AT01, mfr date 12-4-1987),
which shut off while playing a tape.

When I powered it back on, it made noises for exactly 4 seconds, and
then shut off again. None of the buttons (Eject, Play, etc.,) work!

To see what was happening, I removed the casing, plugged it in, and
powered it on. It was REWINDING for 4 secs before shutting off.

When I kept my finger on the Power button, it rewound, stopped,
rewound, stopped -- until it got to the beginning of the tape. Now,
when I press the Power button it TRIES to rewind and shuts off.

Any ideas? Or, are the internal electronics kaput and need a
technician?