@andrius14255 Difficult to say without seeing it. There is a [link|https://www.juraprofi.de/Jura-Ersatzteile/Elektronik-und-Trafo/Elektronischer-Transformator-230V-fuer-Jura-Kaffeevollautomaten::5657.html|transformer] or the [link|https://www.juraprofi.de/Jura-Ersatzteile/Elektronik-und-Trafo/Entstoerfilter-mit-RC-Glied::12842.html|linefilter], which might be broken. We have two guides for other models, but they should help you:
# [guide|141854]. The last step shows how to test it.
# [guide|147392]