Originally Posted by porkupan
To recover you probably don't need to boot from SD card. First of all you need to get into the recovery mode. While the reader is rebooting, press and hold HOME and MENU. The reader should boot into the recovery mode and stop. You may need to hold those buttons until it stops recycling.
You can then log into the USB serial terminal, and restore the ramdisk image by hand.
1) Copy the ramdisk-origi.uimg to micro-SD card
2) Put the card into the reader
3) Mount it:
mount /dev/mmcblk0p1 /mnt/sd
4) cd /mnt/sd
dd ramdisk-orig.uimg of=/dev/mmcblk2 seek=10240 count=600 bs=512
I've tried the key combination you said, but my T1 still stopped at the "opening book..." screen when it restarted from a crash (I've previously root it with minimal-root). How can I unroot it now? My PC doesn't recognize the READER, SETTINGS, and SDCARD disks (plugged in the reader).