Potentially dead duet?
Hi all, having some trouble with the duet Ethernet today.
I can't access the web portal and following these instructions here: https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond
the blue 3.3V LED does not light (even with nothing plugged into the board).
Is this faulty?
The 3.3V LED is green. The blue one is the VIN LED. Which LEDs are working?
I'm getting a Vin LED and a 5V LED with nothing plugged in. With the hotend plugged in (and the board powered from the psu) I'm getting the same but with a heat light.
@dc42 Still no luck today - I cant think of anything that could have damaged the board though, cant find any shorts either.
@edchamberlain, are any of the ICs on the Duet getting hot (in particular U2), or the WiFi module? Does U2 look damaged?
What type of Z probe are you using, and how is it wired?
@dc42 Nothing noticeably warm to the touch (this is an Ethernet model so no wifi module - no activity lights on the Ethernet module port or on my network switch for the port - have tried different cables and different ports).
Z probe is currently unplugged - was using a servo with a IR gate.
If the 3.3V LED is not lit, then unless the LED has failed the 3.3V supply is missing. You could confirm this with a multimeter, if you have one.
In similar cases I have investigated, U2 and U11 were getting hot, and the pattern of blown chips indicated that the +5V rail or the +3.3V rail had been shorted to a fan or heater connection.