Firmware problem, extruder just keeps heating
It all started when i tried to connect my raspberry pi 3 to my Prusa MK3s, it wasnt my first time so i know that it has worked in the past but this time i forgot to turn my printer off before and after some sparks i started to have a Problem, my MK3s keeps heating (only the extruder). The LCD screen says its "(actual temp.)/0" so its not even set to a temperature but it still heats. After that i bought a new EINSY mainboard and then it worked again, everything was normal.
But just now i wanted to connect my raspberry pi again. This time i turned my printer off, connected the raspberry pi the correct way, turned my printer on and it suddenly started heating again, i cant stop it to heat. I tried flashing the Firmware but i always get an error msg:
"avrdude-slic3r -v -p atmega2560 -c wiring -P COM3 -b 115200 -D -U flash:w:0:C:\x\prusa3d_fw_MK3S_3_8_1_2869.hex:i
avrdude-slic3r: Version 6.3-20160220-prusa3d, compiled on Dec 10 2019 at 16:12:25
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
Using Port : COM3
Using Programmer : wiring
Overriding Baud Rate : 115200
avrdude-slic3r: stk500v2_recv(): timeout
avrdude-slic3r: stk500v2_getsync(): timeout communicating with programmer
avrdude-slic3r: Could not open port: COM3
avrdude-slic3r done. Thank you."
And thats all i get, i also tried a factory reset but it just says: "External SPI flash W25X20CL is not responding. Language switch is unavailable."
Can someone help me fix this problem or do i have to buy a new mainboard again ?
RE: Firmware problem, extruder just keeps heating
I am guessing you connect the Pi using the GPIO header?
If you disconnect the Pi is it still dead?
USB connection is much safer for the reasons you indicate.
RE: Firmware problem, extruder just keeps heating
Hello,
I just had the exact same issue, however i did power of the entire system before connecting via gpio. There was a short click as if an electrical breaker tripped, and the printer would not load. After powering down, disconnecting the raspberry, and powering up again, i had the error message :
External SPI flash W25X20CL is not responding. Language switch is unavailable.
It would also not recognize my (confirmed working) sd-card. I will now attempt to flash the printer again, in hopes that there is no hardware damage. I am confident that i have wired up the GPIO header & raspi correctly.