@jens55 Ok, i will be careful. Thank you for all

@aegoHi Jeans55, Just one more thing. Does the hot end positive connect in duet (heater) ?

@jens55 Excellent, that's all I needed. Thank you so much for the huge help.

Guys, I need help.
I set up a prusa i3 model printer with Duet2 wifi and a 12v PSU. Everything works perfectly. Now I want to change the Hot end to a REVO that works with 24v (a friend gifted me). Can I use a 24v PSU only for this Hot end ? Fans and Heat bed continue with 12v. And how to connect with Duet to have both PSU? I appreciate any help

I solve by moving with my hand the pin of the BL. I read somewhere that this is because small particles get introduced and make it difficult to move

@aego
Bearer you are right, I did not check the Erase all, Lock, and Boot from flash boxes. My failure to read the instructions quickly. Again sorry and thank you, thank you very much

@aego
Anyway there was evolution thanks to bearer
my thanks

Yes, I triggered Erase and Reset buttons. I'll reread the instructions and if I jumped anything, I'm sorry

Now after desconnecting all pins, the USB port appeared.
I triggered the Write button, started the process and was soon interruped with the following error message " Flash command failled"

@bearer said in No USB port in Paneldue 7 " firmware installation:

all 4 pins are connected. Should I disconnect the White (Din) or Red (+5v) pin?