New 3Mini5+/PanelDue Build - No ACK, screen garbled

oracledude

Ran through the RRF configurator, dumped the whole config package to the included 512MB microSD, formatted as FAT.

SD Contents:
firmware/Duet3Firmware_Mini5plus.uf2
sys/*.g
www/*

When I power on everything, the board doesn't seem to be responding. The panel due is showing black and grey rows of noise. It is running 3.4.1 firmware and was previously working with my Duet 2 Ethernet. The main board never connects to wifi and the LED Lights are as follows:
G,R,R,B - all steady on
red status - rapid blinking, steady 2-3 per sec

I thought maybe the mainboard needed a firmware update, so I tried to flash it by directly connecting a usb to it while unpowered. I couldn't get the board into bootloader mode vi the 2x reset trick. Using several different cables, I was unable to get any ack from my pc that it was connected. No device showed (Duet, BOSSA, unknown).

Any ideas? Is it toast?

Some documentation mentions erasing firmware and reflashing. I couldn't locate the erase jumper. Does this board even have one?

Thanks in advance for the help!

dc42

@oracledude the Status LED should flash in one of the following ways:

Once per second (on for half a second, off for half a second). Board is operating normally.
Several flashes, then a pause, then repeat. RRF has detected a problem during startup. Count the number of flashes, which is the error code.
LED flashes once briefly, then there is a short pause, then repeat. RRF is crashing during startup. Remove the SD card and see if it still does it.

When you press the reset button twice quickly in succession, the red Status LED should cycle between bright and dim. If each cycle last about 2 seconds then the board is connected to a PC via USB and a removable drive should appear on the PC. If it cycles much faster than that, it is not connected to a PC via USB (perhaps because the USB cable is a power-only cable).

There is no Erase button on the Duet 3 Mini.

HTH David

oracledude

@dc42 it really appeared that it's cycling at about 4Hz steadily, with or without the card in.

I unplugged all cables and actually traced the problem to something on the hot end, plugged into IO_1. Most likely the BL touch or the gyro. Unplugging that brought back the 1Hz blink and my fans powering up.

I should have checked the wiring first. Silly mistake.