sx56 dead after bad update

[mansi]

Hello there guys...
a friend on mine brought me his sx56 to unlock, so when i searched over the internet i found that i need to update the rom with this special ROM, so i tried to update ROM with XDA-developers-SER-v12 using USB cable (cradle) it should take 5 minutes, but the computer restarted itself and the procesure was not compleated, and after that when you push the reset button (hole) it takes you to the bootloader screen and sayes GSM OK and give you the test functions, after that i tried to backup (i should backuped befor updating) the boot, it saied that sd card was writen ok, i hard reseted the device again but nothing happend, now it does noty inter the boot loader again, the device is stuck in the upgrade screen, when you push hard reset or soft reset nothing happens, ofcourse device can not be detected using USB connection.
i think the bootloader was damaged as well as the ROM, is there a way to rewrite the loader and the rom using SD card? because i dont have a serial cable.

thanks in advance

Mansi

[Rudegar]

Ok here you go, its a little outdated but its what I still use:
Qman's how to use XDArit to write nk.nb1 or nk.nbf to your SD card aka the Bootloader Method!
1. Place XDArit and the nk.nb1 or nk.nbf file in the same folder and start XDArit.
2. Select your SD card (disk drive) from the drop down menu.
3. Select Write to SD
Notice that the Windows CE box is already checked so just click the browse button at the end of that window.
4. Select your (nk.nb1 or nk.nbf) image and then Open
Notice by default XDArit will open looking for a *.nb1 file but if you're going to use a .nbf file you'll have to manually change the "Files of Type" to *.nbf
Notice that nk.nbo / nk.nbo was automatically added as your boot-loader and its check box is unchecked so leave it that way and click OK. XDArit should start writing to the card.
When XDArit has finished writing the image put the SD-card into the XDA and hold the power button and soft reset. You'll be taken to the below screen:

SD DOWNLOAD
Card Type:
CE OS & BOOT
Press action to Download
Or
Press REC to Exit
Press action to download and it will start the download/restore from the SD card.
Follow the on screen instructions once its "Completed" which will consist of a "Soft Boot/Reset".