Recently I bricked my DX trying to update my old 2.1.1 firmware to something new. After few unsuccessful attempts to get rootfs.img for my DX (B004) on this forum I decided to go another way:
I downloaded torrent with 3.2.1 firmware hack for 2/DX, extracted rootfs.img and kernel using Kindletools and successfully loaded rootfs using dd. Then I flashed an uimage kernel from the same package (another update*.bin) using uboot console and Ymodem (prg_kernel_serial). After that I successfully started Kindle using bootm command.
So, if somebody has bricked Kindle 2/DX - probably 3.2.1 version is the best option. 3G and web browser works OK. The only problem with 3.2.1 is slow return from sleep mode (sometimes). Since now I don't use sleep at all, switching DX completely off (just holding slider for 5 sec).
PS: you will need a serial console to export MMC0 via USB and flash kernel via Y-Modem.
Last edited by equinox1; 09-24-2012 at 10:04 PM.