Why is the controller not responding?

Question

Electronics

The mega 2560 board has stopped flashing (already 4 in a row) and the LED on the 13th leg is on, the quartz is empty, it’s completely empty.
I'm flashing through another mega 2560.

spoiler

Arduino: 1.8.5 (Windows 10), Плата:"Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"
C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\volko\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\volko\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\volko\OneDrive\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -ide-version=10805 -build-path C:\Users\volko\AppData\Local\Temp\arduino_build_992007 -warnings=more -build-cache C:\Users\volko\AppData\Local\Temp\arduino_cache_346092 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\volko\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\volko\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\volko\OneDrive\Documents\Arduino\libraries -fqbn=arduino:avr:mega:cpu=atmega2560 -ide-version=10805 -build-path C:\Users\volko\AppData\Local\Temp\arduino_build_992007 -warnings=more -build-cache C:\Users\volko\AppData\Local\Temp\arduino_cache_346092 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
Using board 'mega' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\mega" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\sketch\Blink.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\mega" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\sketch\Blink.ino.cpp" -o "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\preproc\ctags_target_for_gcc_minus_e.cpp"
Компиляция скетча...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -Wall -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\mega" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\sketch\Blink.ino.cpp" -o "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\sketch\Blink.ino.cpp.o"
Compiling libraries...
Compiling core...
Using precompiled core
Linking everything together...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc" -Wall -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections,--relax -mmcu=atmega2560 -o "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.elf" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007\sketch\Blink.ino.cpp.o" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/..\arduino_cache_346092\core\core_arduino_avr_mega_cpu_atmega2560_0c812875ac70eb4a9b385d8fb077f54c.a" "-LC:\Users\volko\AppData\Local\Temp\arduino_build_992007" -lm
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.elf" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.eep"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-objcopy" -O ihex -R .eeprom "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.elf" "C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.hex"
Скетч использует 1462 байт (0%) памяти устройства. Всего доступно 253952 байт.
Глобальные переменные используют 9 байт (0%) динамической памяти, оставляя 8183 байт для локальных переменных. Максимум: 8192 байт.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega2560 -cstk500v1 -PCOM8 -b19200 -Uflash:w:C:\Users\volko\AppData\Local\Temp\arduino_build_992007/Blink.ino.hex:i
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, 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 : COM8
Using Programmer : stk500v1
Overriding Baud Rate : 19200
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 : STK500
Description : Atmel STK500 Version 1.x firmware
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% 0.02s
avrdude: Device signature = 0xffffff (probably .reduced_core_tiny) (retrying)
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0xffffff (probably .reduced_core_tiny) (retrying)
Произошла ошибка при загрузке скетча
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0xffffff (probably .reduced_core_tiny)
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.
avrdude done. Thank you.

Answer 1

Device signature = 0xffffff indicates that the chip is not responding to the programmer in a normal way. There are two possibilities:
1) Something is wrong with the FUSE or LOCK bits. If you did not touch them, this option is excluded. If touched, tell me how.
2) The chip is dead.