Dead sam4e8e

[seraser]

Hi all.

Today my duet wifi out of warranty is semi dead, maybe a bltouch clon with 5v logic level but I dont know sure, esp WiFi module are very hot but no shorted, replaced it and now is not hot, Sam hot very little but not shorted on board.

From usb have leds 3v 5v an diag but no boot and usb is not recognized by 2 laptops and usb cable, from vin same happends.

But when turn on the board X, Z, E0 and E1 endstop are high and E0 and bed hot all time, the board have nothing conected, I've desolder the cpu and endstop are fine, checked mosfets and I can open and close with gate the heaters so I think the board is perfect except SAM.

I can buy in Spain a NEW one Sam4e8e au and only one question @dc42 please, if I solder the new one only bossa/samba is needed?

Thank you.

[dc42]

@seraser said in Dead sam4e8e:

if I solder the new one only bossa/samba is needed?

Correct. The bootloader is in the SAM4E8E ROM, so only Bossa or SAMBA is needed.

[seraser]

@dc42 Thank you i will replace.