I know this is an old topic... but I managed to blow the F2 fuse today. I connected one of the pwm fan connections to a proto board via the pins so I could use it to connect some LED's separately with a soldered connection to the proto board and not have to solder on the duet wifi. I noticed that the fans stopped working after that. I checked continuity with all the pins prior and there were no shorts but i must have missed something that caused it to short. That is my guess, but it was directly related to connecting a pwm fan connection to a proto board that just has other pins soldered onto it in a series.

@dc42 The newest version of bossa-cli i could install via aptitude or apt-get was 1.1 so I decided to use the GUI version of BOSSA on my Mac, checking the options to Erase All, Boot from Flash, and Lock, and that worked! Thanks!

The display of my a 4.3" PanelDue stays black. There is no blacklight or any indication of it being on when plugged into the PanelDue Display Controller Board v3.0a connected to my Duet Wifi. Issue persists when connected via the 4 pin PanelDue connection as well as the serial cable to the LCD port as well as when connected with both cables.

I connected it via usb instead of the Duet WiFi for power and the display still does not turn on.

Followed https://miscsolutions.wordpress.com/paneldue/ to try and update the firmware from a Raspberry Pi with the following steps and results, and the backlight remained off the whole time:

Connected to Raspberry Pi via USB
Pressed and held the Erase button of the PanelDue for at least one second, then
released the Erase button, then pressed and released the Reset button.

Terminal:

pi@protoPi:~/PanelDueFirmware $ wget https://github.com/dc42/PanelDueFirmware/releases/download/1.21.3/PanelDue-v3-4.3.bin
pi@protoPi:~/PanelDueFirmware $ dmesg
[ 781.614164] usb 1-1.1: new full-speed USB device number 6 using dwc_otg
[ 781.747885] usb 1-1.1: New USB device found, idVendor=03eb, idProduct=6124
[ 781.747910] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 781.753224] cdc_acm 1-1.1:1.0: ttyACM0: USB ACM device
pi@protoPi:~/PanelDueFirmware $ bossac --port=ttyACM0 -e -w -v -b PanelDue-v3-4.3.bin
No device found on ttyACM0
pi@protoPi:~/PanelDueFirmware $

If I short the Always on solder pads together the backlight comes on but nothing is displayed.

The display worked with no issues since purchased a couple months ago until now.