To replace steam-wand seals (in case of water leaking out from the center of the steam-wand): https://www.youtube.com/watch?v=fulyy9A9... , but note - for parts: https://philips.encompass.com/model/SAER... (worth going to amazon.de and entering the partnumbers into the search box: e.g. the o-rings for the needle-valve (996530013462)
@Dolan Classen (- 07/10/2017 ) - I fixed my machine without so much as a single part needed. If you’re middle thermostat also has no power running through it & it has a little button in the middle, you can just power-down your machine (plug-out etc.) and press that button. The button resets the thermostat and, at least in my case, everything worked.
As per (Dolan Classen 7/10/2017) above my Starbucks Barista just went dead from one day to the next (no other indication of problems). Using a simple phase-tester, I have seen that the middle thermostat (?) (see part 21 from John Steed, February 6, post http://www.kaffeemaschinendoctor.at/saec...) has power entering from the On/Off switch, but not on the return-wire to the appliance power block (Live, Earth, Neutral). I’m assuming it might be worth trying a replacement.
As John Steed’s schematic is possibly for a different machine - I don’t know what thermostat to order. Does anyone know what part 21 would be for the Starbucks Barista? Also, if not, could I directly connect (jump-over) briefly to check the main functioning of the machine to ascertain that the thermostat is indeed the problem (worried this may cause damage)?