Broken...

makerdise

Hello,

one of our customers did call us today, cause 1 of his 3 Duet Ethernets he bought in may 2018 (1.0.3) is broken. According to him, he did nothing than heatup before a print when the Ethernet did drop the connection itself. For now, we need some more expertise @dc42 etc. to analyze what did happen.

All led's are on
Board is recognized as usb device but unreachable through pronterface
U11 IC seems to be ok
He's using a SSR/ 230v heated bed!
According to the customer, there's only one endstop in the 3.3v rail

Cheers
Jan from makerdise.com

T3P3Tony

@makerdise Please can you have the customer confirm what the board is recognised as on USB (BOSSA or Duet?).

makerdise

Hi @T3P3Tony

thanks for joining the discussion. It is on the way to our warehouse... I will analyze it as soon as it reaches our place.
The customer did told me that the SD card is getting hot - I never heard that before.

makerdise

@T3P3Tony - it's recognized as Bossa

T3P3Tony

@makerdise If it is showing up as Bossa then please conduct Fall back procedure 3 on the firmware update:

https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware#Section_Fallback_procedure_Num_3

Also if the SD card is getting hot then it is probably damaged. Try with a fresh SD card with the normal files on it.

makerdise

@T3P3Tony - thanks! The client did try another SDcard from one of his boards without success.

makerdise

@T3P3Tony - FB procedure #3 didn't work when the customer tried it... We will try it ourself on a *nix system in console mode. Anyway, it's not logical that during heatup the SD Card did burn itself blindsided. From my current knowledge, there has to be a short between 3.3V circuit and the only Endstop (it's a 3 wire endstop!!!).

T3P3Tony

@makerdise that is certainly the most common way to fry the SD card however it is possibly for an SD card to fail - even the brand name cards we use.

makerdise

@T3P3Tony - it can't be the SD Card as the customer did test various (he owns 3 ethernets).
Replace or not? I already talked to Roland yesterday, he did point us to the forum in this case.

T3P3Tony

@makerdise Can you confirm what happens when you program it using fall back procedure 3 without an SD card inserted.