got it fixed!!! thanks for your help!!
Just for the record, my Function button is broken. The failure mode is that it is defaulting to being pressed. You can imagine what kind of problem this can cause.
I contacted Elektron and they suggest to send it to the west coast to a repair center. They used to have an eastern repair tech. I guess no longer 
.
argh. this just happened to me. the night before a gig. gonna try the superglue option. everyone please send me some good vibes.
Just take your time and fully understand why you need to do what you need to do.
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I thought my function button was intermittent , quick blast of air and I think it’s ok.
Trig 11 is a little sticky , will look at it tomorrow.
My octatrack hasn’t been used properly for a long time which I think is the main cause.
For anyone else’s reference, here’s a picture. The superglue seems to have worked for now. Hopefully it holds up.
Thanks for the tip about the polarity, I was sable to hold the casing down by hand with the power on to check which was was correct. it doesn’t take much for the alignment to make the button stick to the side of the front panel, so make sure that’s lined up properly. The spring will want to push the button up and pull the casing apart, so make sure you have a large enough clip on hand, or something heavyish you can place on top of the button afterwards.
Also didn’t realise that the control board was mounted to the panel, so didn’t need to take off all the knobs. Though it was strangely pleasing to clear those circles of dust that had built up over the years.
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Never skips leg day.
Also they look shorter in real life. Isn’t that always the way with pictures?
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Having same issue with my octatrack, tried fixing my self but made it worse, now I need new button all together and will have to resolder it, does anyone know if mk2 has same button design or did they move to something more reliabale? Myne broke down on the track 5 button.
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Elektron talked about much more possible buttons press with MKII, IIRC.
Any explanation, advice if I want to do it myself one day?
That is what i followed but it seems like i put more super glue than needed and it froze up the whole button assembly, i tried to dissolve it with alcohol but it didnt help, now i am planning to solder brand new button or possibly just sent it in to elektron to fix. If you are doing it your self, dont make same mistake and use TINY amount of super glue.
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I destroyed a knob once, wanting to clean it with acetone + water. 
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That was my planned answer seeing you writing! 
It was to clean a cheap second hand MC307 bought from a guy smoking A LOT!
Sticky, certain knobs not working.
Acetone worked a bit on yellow (previously white) keys, but the knob cap I used to test after melted!
Sure. And dangerous. I exploded a bottle of glass with acid nitric and brass and received some on my body when I was 14.
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I became crazy and it’s getting worth since I have an OT. 
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Legend! Super easy to fix. Couldnt figure out the mechanics of the button at all until i retrieved the spring and ball from the case. thanks
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Where would someone get that ballbearing if lost
Sounds like you will need a new switch
and the switches. do you know where to get them. ive seen the encoders on e bay, but cant get a button.
by the way. i just glued it. put the ball an the four edge tiny thing, the spring on top, the glued up the broken button. but powering it up it doesnt work. any idea? i just read something about polarity. i tried to put everything in the order it was, but didnt double think in polarity issues.
may it be the matter? i will have some stuggle ungluing that up…
Just a contact. No polarity. Imho.
Break it to repair. I don’t recommend to unsolder, can be worse.
Ideally make a test before gluing. Now I’d put glue on a double side adhesive and glue after press. Otherwise there is a risk to glue inside…
ll do my best. thanx for answering.
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