Hi gr5.
This seems to be exactly my issue.
K1 is the big white block beside the connector-cable.
When I turn on the UM, I can't hear or feel it switch.
Unfortunaly, tapping does't help.
And I have only one green light on the board after switching power on.
Sorry, I'm not familar with this forum-software - How can I insert pictures in my posts?
Thanks, druckernoob
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gr5 2,225
I'm not familiar with the first run wizard since if I ever ran it then it was probably a year ago. There is a relay, K1 that can be "sticky". If the relay doesn't close then everything has power except for the following:
4 stepper motors, nozzle heat, bed heat.
I had a problem with this relay. If I turned the machine off for an hour and turned it back on the relay would work. If the machine was warm and I turned it off and on again it would *not* work.
My fix was to give it a tap. The larger cover underneath the UM2 is easily removed by removing only 2 screws. I recommend you do this just to do the same test I did. The fix is to get a new white PCB but it's important to make sure you definitely have this problem. Here is a video demonstrating the temporary fix:
Remember - this is only one possibility. There are other possible problems.
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