[BUG]<Gets stock in Prusa logo>

[dlmsound]

Printer type - MK3S,
Printer firmware version - [ 3.10.1

**SD card
print via SD card

Describe the bug
I was trying to update to a 3.11. It get stock always in verifying firmware 100%. I try with to many different firmware, cables, PC/Mac,also I try to flash Xloader with no luck , I don’t know if my einsy Rambo is toasted. I’m a little frustrated because is practically a new machine.

Error
eading 1##并＃##井##＃#井#＃并#井#＃＃#井并＃井##井#＃井##＃＃＃##＃＃#护＃我##我###1 100号 32.12S
avrdude-slic3r: verifying
avrdude-slic3r: verification
error, first mismatch at byte 0x0100
0x02 != 0x3f
avrdude-slic3r: verification error; content mismatch
avrdude-slic3r done.
Thank you.

[dlmsound]

[leptun]

Please upload the complete log from the firmware flasher

[dlmsound]

Hey thank for your quick response!!!!
Here is the log

avrdude-slic3r -v -p atmega2560 -c wiring -P /dev/cu.usbmodem14101 -b 115200 -D -U flash:w:0:/Users/machd/Desktop/prusa3d_fw_MK3S_MK3S+_3_11_0_4955.hex:i

avrdude-slic3r: Version 6.3-20160220-prusa3d, compiled on Sep 6 2022 at 09:19:15
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

            Using Port                    : /dev/cu.usbmodem14101
            Using Programmer              : wiring
            Overriding Baud Rate          : 115200
            AVR Part                      : ATmega2560
            Chip Erase delay              : 9000 us
            PAGEL                         : PD7
            BS2                           : PA0
            RESET disposition             : dedicated
            RETRY pulse                   : SCK
            serial program mode           : yes
            parallel program mode         : yes
            Timeout                       : 200
            StabDelay                     : 100
            CmdexeDelay                   : 25
            SyncLoops                     : 32
            ByteDelay                     : 0
            PollIndex                     : 3
            PollValue                     : 0x53
            Memory Detail                 :

                                     Block Poll               Page                       Polled
              Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
              ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
              eeprom        65    10     8    0 no       4096    8      0  9000  9000 0x00 0x00
              flash         65    10   256    0 yes    262144  256   1024  4500  4500 0x00 0x00
              lfuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
              hfuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
              efuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
              lock           0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
              calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
              signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

            Programmer Type : Wiring
            Description     : Wiring
            Programmer Model: AVRISP
            Hardware Version: 15
            Firmware Version Master : 2.10
            Vtarget         : 0.0 V
            SCK period      : 0.1 us

avrdude-slic3r: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude-slic3r: Device signature = 0x1e9801 (probably m2560)
avrdude-slic3r: reading input file "/Users/machd/Desktop/prusa3d_fw_MK3S_MK3S+_3_11_0_4955.hex"
avrdude-slic3r: writing flash (250500 bytes):

Writing | ################################################## | 100% 44.28s

avrdude-slic3r: 250500 bytes of flash written
avrdude-slic3r: verifying flash memory against /Users/machd/Desktop/prusa3d_fw_MK3S_MK3S+_3_11_0_4955.hex:
avrdude-slic3r: load data flash data from input file /Users/machd/Desktop/prusa3d_fw_MK3S_MK3S+_3_11_0_4955.hex:
avrdude-slic3r: input file /Users/machd/Desktop/prusa3d_fw_MK3S_MK3S+_3_11_0_4955.hex contains 250500 bytes
avrdude-slic3r: reading on-chip flash data:

Reading | ################################################## | 100% 32.47s

avrdude-slic3r: verifying ...
avrdude-slic3r: verification error, first mismatch at byte 0x0100
0x02 != 0x3f
avrdude-slic3r: verification error; content mismatch

avrdude-slic3r done. Thank you.

[leptun]

From the log it looks like it's failing to verify the first upload stage data. I've never seen this error before. The only way for this to happen is if the hardware is faulty. Please contact Prusa support to get your board replaced.
You also said that you tried other cables, so that rules out a power issue. I don't think xloader works with this microcontroller. Only avrdude works using the "wiring" programmer type.

Did you flash the firmware many times on that board? The board can only be flashed at least 10000 times before the flash starts dying in this way. I also see that you have different fuse settings than standard (hfuse 0xD0 vs the stock 0xD8).

[dlmsound]

Is there any other way to get fixed. If I buy those main chip and replace it and try to program again it can work again?

[dlmsound]

[leptun]

Only the atmega2560 would need replacing for it to work again. And of course it would need the bootloader flashed again using a programmer.

[dlmsound]

What kind of bootloader do I need and programmer ?

[leptun]

Any AVR compatible programmer. It needs to be able to upload using the ICSP header.
The bootloader used is https://github.com/prusa3d/Arduino_Boards/blob/master/IDE_Board_Manager/prusa3dboards/bootloaders/prusa_einsy_rambo/stk500boot_v2_mega2560.hex
It is better if the Arduino IDE is used for "burning the bootloader" since that also sets the correct fuse settings.

Since this issue is not related to the 8bit firmware, I will be closing the issue. Please consider either contacting Prusa support if this is an original board or asking for technical help on the forum (for example, here: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/)

[Prusa-Support]

Thanks for bringing this to our attention.

You can reach the official Prusa Technical Support either via email or Live Chat.
https://help.prusa3d.com/article/customer-support_2287

I personally recommend writing an email to [email protected], with reference to this issue (Prusa-Firmware/issues/3640), to my attention (Michele Moramarco).

We may want to start with installing the firmware on the Einsy board fully disconnected (except for PSU and computer), and taking this chance to take clear pictures of the Einsy board front and back without any connections.
Please continue via Tech Support.

Michele Moramarco
Prusa Resaerch