A20-OLinuXino-LIME2-e16Gs16M - powerbutton / boot issues

[muteaudio]

hi

I am using the A20-OLinuXino-LIME2-e16Gs16M as a standalone; power supplied by the 5V power jack. after first installing the ubuntu desktop edition via micro-sd, I had the problem that the lime2 booted as soon as I plugged the 5V jack in - that disappeared after the first armbian package upgrade via apt (around beginning of August). now lime 2 started when the power button was pressed - but not always. compared with the other two microswitches the power button feels a little bit as if it is stuck. does anyone know, where one can get them and if replacing can be done reasonably easy (not an soldering expert) ?

since the last package update 2 days ago, it won't boot, no matter how often I press the butten. hence it is not powered, I can also not access it via usb to make changes.
I don't know if this is coincidental and a harware issue or if the update had to do somethoing with it.

I would appreciate some ideas what I could do

best regards