How to re-init bootloader on Nano?

Using Arduino Microcontrollers
1

I think the bootloader is broken on my new Nano-clone. Can someone tell me how to re-install a bootloader so I can upload a sketch to my Nano?
Thanks....arniep

2

You need an AVR ISP, an In System Programmer.

Can be a stanalone tool (i.e. a dedicated circuit) such as
http://www.mdfly.com/index.php?main_page=product_info&cPath=5&products_id=415

or an Arduino with a sketch that can act as a programmer, I think Nick Gammon has the best writeup:

3

Do you know if this will work if I connect a working UNO R3 to the Nano v3.0 that I want to reinstall with the bootloader? Should this wind up with me being able to upload sketches to the Nano once with Arduino 1.5.3 once again?
Thanks...arniep

4

Following Nick's programming guide, yes.
Have not used 1.5.3, if it operates with same speeds & boards as 1.0.5, you should be okay.