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[on:]

Can I somehow burn bootloader to my repaired nano using laptop and some cable via ICSP?
Seems like new atmega havent got  any bootloader on board.

[Reply #1 on:]

Yes, pretty easily.
In the IDE:
Tools: Select a Board - Uno will work well
Tools: Select your ICSP programmer (you do have a programmer, yes?)
Tools: Burn Bootloader

If you don't have a programmer, or a working Arduino, you are kinda out of luck.
Programmers can be found inexpensively, such as
http://www.nkcelectronics.com/pocket-avr-programmer.html
A programmer is a handy tool to have, everyone hobbyist should have one.  Or, keep a working Arduino around to run a programming sketch on to program other devices.
I've managed to accumulate 4 or 5 programmers, and use this one exclusively at the moment because it reliably programs the larger memory devices such as ATMega1284P:
http://www.mouser.com/ProductDetail/Atmel/ATAVRISP2/?qs=sGAEpiMZZMv256HIxPBQcA8%252bsNH3cLLR

[Reply #2 on:]

Thanks for answer . Unluckily I do not have a programmer or spare Arduino 

Can you explain how pocket programmer works  ? It comes with some cables or connector to connect to Arduino  ?

[Reply #3 on:]

The programmer connects to your PC at one end with a USB cable.
It connects at the other end to your Arduino board's ICSP 2x3 male header pins via a ribbon cable.
The pocket pirate I linked to includes a 10-pin to 6-pin ribbon cable.

[Reply #4 on:]

Thanks again
Stupid question , but i will try : any chance I can use USB-TTL converter for that job ? Its somewhere in my boxes...

[Reply #5 on:]

Maybe:
http://www.geocities.jp/arduino_diecimila/bootloader/index_en.html
This uses the FTDI chip's
CTS, DSR, DCD, and RI pins - see the X3 connecter here
http://arduino.cc/en/uploads/Main/arduino-duemilanove-schematic.pdf

to drive the SCK, MOSI,  MISO, and Reset pins on the ICSO header.
If you can connect to them, this method does work.  I still have a Duemilanove set up pins added to make the connections above.  It takes a bit to set up all the files.

If you have Win7 or 8, there may be some extra fooling around to do as well to allow unsigned drivers, etc.  I saw yesterday that perhaps pressing F8 on bootup provides the option to turn that checking off.

[Reply #6 on:]

Win7 here . 
Now lets start reading.

[Reply #7 on:]

I dont know it is possible....

No X3 header on nano. USB chip so small , I cant imagine soldering wires directly to it.   

EDIT:

Or should I use my TTL converter instead ?  Then I need to find converter pinout...

Nope - converter has only Tx Rx on output  pins. Chip same size as on Arduino itself , so no soldering for me.

[Reply #8 on:]

Guys, where do I find bootloader file for nano  ?
I want to use with stand alone programmer.

[Reply #9 on:]

Solved.
There is one in bootloader folder. Just not marked as "P" , but works well.