Norns Shield - replacing K1

I am the sad owner of a Shield with a non-functioning K1 button. I would appreciate advice on fixing it.

Replacement may not be necessary. Per https://github.com/monome/norns-shield:
“most soldering problems can be solved simply by reheating solder joints. bad solders can result in various problems: screen doesn’t turn on, knobs/keys don’t work.”

If replacement is necessary, this is one of two parts needed:
https://octopart.com/pva1+oa+h1+1.2n+v2-c%26k+components-31930236

However, I haven’t been able to identify the part for the cap/knob.

Thanks in advance for advice.

I think this is the part:
https://www.digikey.com/en/products/detail/c-k/PV-BK/417729?s=N4IgTCBcDaIAoDUBCBpEBdAvkA

I think this should fit too if you want to convert to rectangle buttons:
https://www.digikey.com/en/products/detail/c-k/PE-BK/417703?s=N4IgTCBcDaIAoFEBCBpEBdAvkA

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Excellent. Thanks, bmoren.

If a reflow doesn’t fix it you could try a small amount of ‘chip quik’ to help with desoldering the button. I recently removed a broken small tactile switch easily with it to repair an old kawai sound module. Some soldering braid for a little clean up after is also needed before soldering in the new part.
I have no doubt it would be useful for desoldering Norns encoders too.