Error while burning bootloader

Question

I am trying to burn bootloader on Arduino UNO using MEGA2560 as the programmer, I followed the steps stated here but still get the error below:

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 "/home/arduino/arduino-nightly/hardware/tools/avr/etc/avrdude.conf"
 User configuration file is "/home/webdev/.avrduderc"
 User configuration file does not exist or is not a regular file, skipping
 Using Port : /dev/ttyUSB0
 Using Programmer : stk500v1
 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 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 = 0x000000 (retrying)
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x000000 (retrying)
Error while burning bootloader.
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
 Double check connections and try again, or use -F to override
 this check.
avrdude done. Thank you.

Note: The Arduino UNO stopped responding when I mistakenly short-circuited a connection, I mistakenly passed 12v to one of the header pins of sensor shield mounted on the board.

How it was connected Connection diagram

• jwh20: You note about short circuiting needs more explanation. Depending on what you did the device may be damaged.
• jwh20: Clearly, however, the MEGA is not communicating with the Uno. Please share how you have this hooked up.
• Ruby: @jwh20 I have included a connection diagram to the question.

Answer 1

Based on this:

Note: The Arduino UNO stopped responding when I mistakenly short-circuited a connection, I mistakenly passed 12v to one of the header pins of sensor shield mounted on the board.

There are no I/O pins on the Arduino that are 12V tolerant. You have almost certainly "fried" your Uno board. It's possible the only casualty is the ATMega chip itself and replacements are available from a number of sources or you can purchase a "raw" one from an electronics reseller and use your programmer setup above to burn your own boot loader.

It's also quite likely that your sensor board is damaged as well.

From the Microchip datasheet:

enter image description here

You want something like this:

Adafruit Pre-programmed ATMega168p

Buy several, accidents happen!

• timemage: If it's any consolation, I've put 30VDC onto a pin of a Arduino Leonardo, just being sloppy with leads on a table. Strangely, it "worked" after that, though not the GPIO pin. But, it was rather hot and bothered about it and so untrustworthy thereafter; I mean it ran code, but you could fry an egg on it while it was doing so. I replaced the chip on it and now it's fine. It is entirely possible that only the AVR on your UNO is dead and with some work may be replaced. If it's a DIP based UNO as pictured, this is comparatively easy.
• jwh20: Anyone who has experimented with electronics for any length of time has experience "smoke". I've lost track of how many expensive chips I've fried due to one oversight or another.
• timemage: Or an Adafruit Pre-programmed ATMega328P rather.