sad little camera

It looks like my little one, Sony RX100 iii, is dying.

The shutter button seems to have some kind of loose contact (or better: the opposite of this). When I press it and let it go again the frame on the display that shows if the pic would be sharp remains green. And as the camera ‘thinks’ I’m still pressing the button half way, all other buttons and functions are blocked. In the beginning, I could unblock it by tapping several times on the button, but that's over now too. Can I fix this somehow? Anybody knows the same problem?

If I send it to the Swiss Sony repair centre I have to pay CHF 130 (about 130$) only that they have a look at it - and more if they repair it, of course. That's crazy. Maybe better invest it in a new camera... But this hast been my most loyal camera companion during the last several years, I don't want to replace it for such a stupid issue 😔

I found repair parts on aliexpress (see link), but no idea if that's the right thing and above all no idea how to fix it, no help found on ifixit.com... If anybody is experienced with such stuff and could encourage me about fixing my camera...?!

aliexpress.com/item/4000081931...