[Vibrant Q&A, Help & Troubleshooting] kobesabi:
Thanks to this post, it helped took me off the loop of not able to restore JFD over it or truly get back to stock. I think I got it all restored as I can now install app and stuff.

It all happened when I took wrong advice or misunderstood and did "Wipe Partition Cache" in CWR. problems...after problems...after problems...

Phone Symptoms: Vibrant S splash screen and noisy bootup sound were there, but it changed to black screen with all four buttons at bottom lit up for a little while then disappeared to all pitch black on phone screen and buttons. I guess you can call it black soft brick? When you odin back using Eugene_2E_JK2_Froyo.tar.md5, it gets your Vibrant in semi-bootable state. If you odin back JFD tar, it brings back to original problem. In the recovery screen you also see "MBR Checksum Error, Movinand Checksum Confirmation Fail"...and when you try to apply update.zip it shows "data wipe failed" somewhere in the screen.

Anyway, here's what I did to get it back where you can flash JFD or Kies mini to recognize your phone for Tmobile update etc. even though "MBR Checksum Error, Movinand Checksum Confirmation Fail" still exist. I can't tell if that is normal or not, but at least Kies upgrade works...and can still install app and no more black soft brick.

Files needed:

* i9000 Froyo file: Eugene_2E_JK2_Froyo.tar.md5 (from http://eb-productions.proboards.com/index.cgi?board=samsungsgs&action=display&thread=3

in the link "Vibrant_Full_Froyo_Odin_AND_2E_Recovery_+SD_Fixed"

http://www.multiupload.com/12QAKU043I )

* s1_odin_20100512.pit ( also from same page above but in the pit link )

* T959UVJFD.tar ( from http://www.justanotherdev.slackdev.com/T959UVJFD.tar via http://xdaforums.com/showthread.php?t=734475

* i9000 with cwr to disable voodoo lagfix (ext4) Voodoo-stable-5.2-Froyo-2.2.1-GT-I9000-odin-pda.tar (from http://dl.project-voodoo.org/Voodoo-stable-5.2-Froyo-2.2.1-GT-I9000-odin-pda.tar or whatever new files at http://project-voodoo.org/download for Froyo )

1) Get your phone into download mode, fire up ODIN ( I used 1.7)

2) In ODIN, load s1_odin_20100512.pit into PIT and Eugene_2E_JK2_Froyo.tar.md5 into PDA. Checked or unchecked repartition does not seems to make a difference. Hit start and wait till completion with a pass. Reboot. It'll boot but will you not be able to install ROM Manager or most other apps with error saying something about no diskspace.

3) Copy the Froyo 5.2 Voodoo-stable-5.2-Froyo-2.2.1-GT-I9000-unsigned-update.zip for i9000 to your Vibrant /mnt/sdcard/update.zip via phone file manager or adb push... Then do 'adb reboot recovery' to put the phone into recovery mode or the 3 button push method.

Boot will show i9000 and button will go in wrong direction on your vibrant in recovery mode...ignore the wrong direction...go to voodoo lagfix, disable it, reboot.

4) Go to download mode and fire up ODIN again. Load s1_odin_20100512.pit into PIT and T959UVJFD.tar into PDA. Make sure 'repartition' is selected/enabled. Hit start, reboot, now things back to normal. You can install app...or do Kies...whatever...

PS: Can someone who have normal working phone let me know if you still get "MBR Checksum Error, Movinand Checksum Confirmation Fail" when going to recovery mode?

PPS: Instead of Kies, you get back to official stock froyo via odin with this only file (load to PDA) and NO repartition checked: T959UVKA6_REV05_home_low_CL860813.tar.md5

( from http://www.multiupload.com/GZT6ZYFX46 via http://xdaforums.com/showthread.php?t=919687 )