UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
I think that’s true that yow blew the Darlington transistor and you can easily find it as it is black 3 pin devices and moreover you can also find it on the PCB as it is designated as Q4 on the PCB.