On Tuesday, April 2, 2019 at 8:17:34 PM UTC-7, wrote:
Hi I have a sony betamax, I can see even though there is no tape inside, the mechanizem inside is in position like there is a tape inside. Only know this because I have a working beta sony to compare. Any help? When i press power ect it does try to eject but that metal tab piece doesnt move the one that normally grab the tape and brings it around.

The most likely problem in the current century is a snapped belt (rubber band)
That means you want to open the gizmo, find the rubber scrap that used to
be a belt, measure it, and cut something out of a tire innertube that more-or-less
matches (or get an O-ring the right size from a mechanical-supplies outfit)..

A cleanup and light greasing (silicone grease is messy, but effective) might also help,
and if you find dead insects in the mechanism, those ought to be removed.

Except for the little brittle parts of the heads, a wipe with cotton swabs moistened
with isopropyl alcohol is usually beneficial to the moving and contact-with-tape parts.