Flash blob on ASUS Transformer 101(G)

1. Download latest firmware from asus (TF101)
2. Unzip using ES File Explorer (you will have another zip)
3. Unzip blob from extracted zip to /sdcard
4. Download Terminal Emulator
5. Open Terminal Emulator and switch to root

su

6. Ran the dd-command:

dd if=/sdcard/blob of=/dev/block/mmcblk0p4

7. Ran the sync-command (not required as it only syncs filesystems and no block devices, but it feels good to do)

sync;sync

8. Wait two minutes (should not be needed either)
9. Shutdown the device
10. Boot the device. you will see a progress bar.

Depending on the ROM you previously used, the transformer might be able to boot. 

It will take feeled 15 min. to be able to log in ;-)

If it does not boot, don't worry:

- Hold down the minus-volume button (down) when booting
- Wait till the message about cold-boot appears
- Re-press Down to switch the icon from Android to 'WIPE DATA'-icon.
- Press Up and Press Up again to confirm.

Even if your transformer did boot fine, without wiping, I do recommend a factory reset (via method above or via settings).

Be aware that this will erase all your data, also on the internal sdcard. External SD-card will not be touched.