No it's not green anymore, it used to be. But i think when i pressed ERASE it stopped turning green.
I tried the recovery procedure as described in the documentation several time but without success.
I made a small video to show you what is happening :
https://www.youtube.com/watch?v=U_LN9gJqXUc

Thanks DC42,
iam worry now. As you mentioned i tried to use different usb cables ( the red one on the picture i use is working properly since i used it to activate the wifi originally) without result. I also tried to erase and then use sam-ba to inject the firmware, but the board doesn't get detected on widows. I opened the device manger and look at the Ports (COM & LPT), but the list doesn't update when i plug the board. i also tried with and without the sd card as well.
I tried the procedure from :
https://duet3d.com/wiki/What_to_do_if_your_Duet_or_Duet_WiFi_won%27t_respond
https://duet3d.com/wiki/Updating_main_firmware
without success…

It sound like this board is faulty, DC42 do you think i should send it back ?

Thanks DC42, i will check the config.g when i can access back the web interface.
unfortunately my duet wifi stopped working for some reasons. I can't access the web interface from the usual ip adress.
To troubleshoot it i plugged it in usb, but the computer doesn't seem to recognize it. Then i unplugged all the wires from it thinking it could be a short circuit, but still when i connect the board to the computer in usb, it doesn't get recognized ….
This is a picture of it:
http://imgur.com/a/YbXyY
Does the Diag Led is alerting that there something wrong?

Should i try to reset or Erase ? Maybe the microsd broked ?

Thanks for your answer DC42.
So i plugged my fan to fan1 as you mentioned. But the fan is turning ON when i turn on the duet wifi, as an always On fan.
Towards which temperature the fan start to turn on ? I leave in singapore, the average temperature here 30 degrees

Hi,
I have an extra fan attached next to my print head that should turn on when the temperature is high. So i plugged it on Fan0 on the duet Wifi. The problem is it never turns on …
The fan is wired correctly because when i plugged it into "always on fans" it is turning on when i start the duet.
I guess i am missing a configuration line in my config.g file ?

Hi yes finally i have resolved this issue.
I bought a multi-meter and realized that my wire was faulty … So i changed it and now it all work as intended!
thanks a lot for your help guys.

Thanks for your answer DC42.
Yes the heatE0 led light up red when i choose a temperature.

If no, have you selected tool 0?

Iam not sure what do you mean? To test the print head i just choose a temperature from the drop down menu on top of the screen.

If yes, check the resistance between the ferrules to make sure you have good connections.

Yes i think i'll go ahead and buy a multimeter next week!

Hi,
I am new to electronics and 3 printing so please bear with me
Iam trying to test the head heating function of my delta printer. The temperature sensor seems to work fine, but the heating wire seems to have an issue.
This is how i wired it:
http://imgur.com/a/NUtk6
When i select a temperature in the duet wifi, the temperature doesn't rise up …
Any idea why ?

Ha i fixed it!, mechanical issue

This is what happen when i execute the auto-calibration : https://youtu.be/g-fBQl13hDI

The first calibration point works fine, but then the head twist … Any idea why the head twist like this ?