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I have flashed (SelectorFirmwareMk4.ino.hex) according to the instructions from Chris' Basement and and now the unit is unresponsive. Below are my results. It looked like it flashed fine my unit I received a couple weeks ago was a MK4 if that helps. I'm just trying to add the OLED and 3dautoclippy.

C:\Users\Rocheambeau\OneDrive\Desktop\3dcham>avrdude -P com3 -b 19200 -c avrisp -p m328p -v -e -U flash:w:SelectorFirmwa

reMk4.ino.hex:i

avrdude: Version 6.3-20190619

Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr\etc\avrdude.conf"

Using Port : com3

Using Programmer : avrisp

Overriding Baud Rate : 19200

AVR Part : ATmega328P

Chip Erase delay : 9000 us

PAGEL : PD7

BS2 : PC2

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 20 4 0 no 1024 4 0 3600 3600 0xff 0xff

flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff

lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00

hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00

efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00

lock 0 0 0 0 no 1 0 0 4500 4500 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 : STK500

Description : Atmel AVR ISP

Hardware Version: 2

Firmware Version: 1.18

Topcard : Unknown

Vtarget : 0.0 V

Varef : 0.0 V

Oscillator : Off

SCK period : 0.1 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.03s

avrdude: Device signature = 0x1e950f (probably m328p)

avrdude: safemode: lfuse reads as 62

avrdude: safemode: hfuse reads as D9

avrdude: safemode: efuse reads as FF

avrdude: erasing chip

avrdude: reading input file "SelectorFirmwareMk4.ino.hex"

avrdude: writing flash (10830 bytes):

Writing | ################################################## | 100% 12.18s

avrdude: 10830 bytes of flash written

avrdude: verifying flash memory against SelectorFirmwareMk4.ino.hex:

avrdude: load data flash data from input file SelectorFirmwareMk4.ino.hex:

avrdude: input file SelectorFirmwareMk4.ino.hex contains 10830 bytes

avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 6.96s

avrdude: verifying ...

avrdude: 10830 bytes of flash verified

avrdude: safemode: lfuse reads as 62

avrdude: safemode: hfuse reads as D9

avrdude: safemode: efuse reads as FF

avrdude: safemode: Fuses OK (E:FF, H:D9, L:62)

avrdude done. Thank you.