Burn bootloader from Leonardo to UNO R3 ?

[princeborn1999]

Greeting guys!
My UNO R3 can't use(plug in computer but computer can't detect arduino uno r3 , didn't show
Port and COM in device manager as well) after using IRtransmitter

I wanna burn bootloader for arduino uno, I've a Leonardo board.
I'm not sure it's possible Leonardo as programmer?

Burn bootloader from Leonardo to UNO R3 is possible? Because I only find tutorial about UNO to Leonardo.

[sterretje]

It should be possible using the Leonardo as a programmer. You'll have to use the 6-pin header on the Leonardo.

@princeborn1999

My UNO R3 can't use(plug in computer but computer can't detect arduino uno r3 , didn't show
Port and COM in device manager as well) after using IRtransmitter

I have some doubts that it will help if the board is not recognised. The board recognition is done by the serial-to-usb converter on the Uno; that is the chip closest to the USB port. Burning the boot loader will not affect that chip.

[Budvar10]

@princeborn1999

My UNO R3 can't use(plug in computer but computer can't detect arduino uno r3 , didn't show
Port and COM in device manager as well) after using IRtransmitter

Probably some damage on power circuit? Anyway, as @sterretje wrote to burn a bootloader doesn't help with UNO recognition on PC. It is matter of USB-serial transceiver.

[princeborn1999]

@sterretje

I have some doubts that it will help if the board is not recognised. The board recognition is done by the serial-to-usb converter on the Uno; that is the chip closest to the USB port. Burning the boot loader will not affect that chip.

Can you point out which part is the problem? in this picture

By the way
1.leonardo currently can work in my laptop
2.I bought an new usb for arduino uno but still not work
3.When I plugin uno to laptop, the ON and L are light(which means it seems show my uno board haven't big problem?)

[princeborn1999]

But my uno's light is work on "ON" and "L"
how do you know is the matter of USB-serial transceiver?

[sterretje]

@princeborn1999

Can you point out which part is the problem? in this picture

See the circled component.

@princeborn1999

1.leonardo currently can work in my laptop

Leonardos work totally different; you will see that it does not have the additional chip.

@princeborn1999

3.When I plugin uno to laptop, the ON and L are light(which means it seems show my uno board haven't big problem?)

Sorry to disappoint you; the ON LED only means that it has power, the L-LED depends on the state of the 328P processor and/or the code that you loaded.

@princeborn1999

how do you know is the matter of USB-serial transceiver?

I can only tell you that it's not the 328P. There are 3 possible thingsthat can fail regarding the serial-to-usb converter

1. Your operating system
2. The cable
3. The serial-to-usb converter itself

You basically excluded (2) by using a different cable.

For 3, you can try to burn the firmware on the serial-to-usb converter if that chip is as shown in the picture (16U2, square chip). If your board is a clone with e.g. CH340 (rectangular chip), you can't. You can find the firmware in the directory C:\Users\yourUsername\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\firmwares\atmegaxxu2 and you either need a programmer (like the Leonardo) or use Atmel Flip; I have never had to do it so can't advise.