Hi - anyone ever had an un-responsive board with loss of both 5V and 3V3 (12V fine) even with nothing connected other than the +12V feed supply ?
Also, anyone able to clarify the differences between v2.0 and v2.1 variants of this board ?
Thanks @LsrSal for the roadmap…
It looks like the 12V goes into U4 for 5V which supplies U5 for the 3.3V, you could check U4s output… I doubt there is any…
Doesn’t mean U4 is bad, U5 could be shorted to ground.
Unless you have the proper equipment, it’s hard if not impossible to just replace a component, hence ‘no user serviceable parts’…
IMHO … I’d send it back…
Good luck
Thanks for the info - this board came pre-fitted with plug-in stepper motor drivers and I’ve now deduced that they were fitted ‘upside down’ which presumably shorted the board supplies and likely damaged the drivers as well
Lesson learned - don’t assume the delivered product has been properly configured and tested prior to shipment - check EVERYTHING before powering up !
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