[Asus  Eee Pad Transformer Prime] vanquishe:
I am in the same fix. Here is what I did so far. I hope someone can provide some advice.

1. Stock JB, newest from OTA, untouched

(im from japan, so i think its a JP SKU)

2. Followed guide to unlock + backup blobs + enable nvflash for JB

http://matthill.eu/android/transformer-prime-tf201-jellybean-nvflash/

3. Rooted with motochopper

4.Followed guide to install: [ROM][4.4.2 CM-11.0][Cyanogenmod 11.0 Unofficial][KOT49H][20/02/14]

http://xdaforums.com/showthread.php?t=2589554

4.1 Downloaded and transfer following files to sdcard folder

cm-11-20140220-UNOFFICIAL-tf201

pa_gapps-modular-mini-4.4.2-20140227-signed

4.2 Downloaded recovery.img.SOS 2013-12-29 08:42

http://xdaforums.com/devdb/project/?id=2229#downloadsfastboot -i 0xb05 flash recovery recovery.img.SOS

4.3 fastboot -i 0xb05 flash recovery recovery.img.SOS

(I did notice it was 0xb05 and not 0x0b05 but i copied paste exactly)

4.4 restart TF, "power+down", select RCK

4.5 Did the following in recovery menu:

a. Backup, but did it to sdcard instead of ext storage

b. wipe data/factory

c. wipe cache partition

d. wip dalvik cache

e. install zip: cm-11-20140220-UNOFFICIAL-tf201

f. install zip: pa_gapps-modular-mini-4.4.2-20140227-signed

At step f, the screeen said somthing about insufficient space.

So i thought i would try without GAPPS and selected reboot system now.

5. Got stuck at Asus word in middle of screen

a. Bottom right shows "Powered by nvidia terga"

b. Oddly, top left no longer displays "device is unlocked"

6. Tried to reboot (holding power long time)

a. Screen black out, vibrate

b. Tried to get to fastboot (power + down) but the icons never show

c. Constantly stuck with Asus screen

7. Attempted to follow guide:

[GUIDE] nvFlash General Users Guide [Unbrick/Recover/Downgrade/Upgrade]- TF201

http://xdaforums.com/showthread.php?t=1927818&highlight=nvflash

a. "Power + up", apx device shows in windows 7 device manager

b. wheelie.exe --blob blob.bin

c. nvflash.exe -r --download 4 bootloader.EBT

(bootloader.ebt is the output i got previously from flatline)

(my bootloader.ebt is 1,558,608 bytes)

(blob.edt from TF201-JB-10.4.2.15-Unblobed is 1,558,589 bytes)

d. This is the log

log: C:\nvflash>nvflash.exe -r --download 4 bootloader.ebt

Nvflash v1.13.87205 started

[resume mode]

sending file: bootloader.ebt

bootloader.ebt sent successfully

e. Device went black screen, device manager does not show APX

f. I power the device up but shows black screen. "power + down" still does not work.

g. However, "power + up" still get APX device in windows.

---------- Post added at 10:40 AM ---------- Previous post was at 09:51 AM ----------

Im thinking I could try either of the following:

Option 1:

1. Follow this [GUIDE] nvFlash General Users Guide [Unbrick/Recover/Downgrade/Upgrade]- TF201

http://xdaforums.com/showthread.php?t=1927818&highlight=nvflash

but use the boot.ebt from TF201-JB-10.4.2.15-Unblobed

and try to go as far as I can and pray for the best

(what puzzles me is that instructions dun seem to have anything to do with the unlock-token.img,bricksafe.img,factory-config.img)

Option 2:

1. Follow this [NvFlash] [Recovery] With [Generated Blobs][TF300T]

http://xdaforums.com/showthread.php?p=48948717&highlight=bricksafe+img#post48948717

seems to talk about unlock-token.img,bricksafe.img,factory-config.img

but it is for tf300T

also, i have no idea how to get the following file

"this is how we got around it.download the correct .blob from TWRP rename it twrp.blob then run

"Code: nvflash -r --download 5 twrp.blob"

Option 3:

1. Sit and wait for help... no one on MIRC seems to be responding T T

Any ideas?