3GS stuck at apple logo - no solution

[shivangp]

Like others my 3GS (old bootrom - week 25) is stuck in the apple boot logo loop and I can't get it out. This happened after I upgraded to 4.2.1 and jailbroke with redsn0w 0.9.6b6. Here's what I tried so far in the follow order, I had tiny umbrella 4.21.01 running with TSS server for all steps:

1. "Just boot tethered" - tried a few times with no luck just got apple logo
2. Enter pwned dfu mode and restore to stock 4.2.1
3. Enter pwned dfu mode and restore to custom 4.2.1
4. Run redsn0w again but install iPad baseband
5. Disconnect battery for an hour (opened case and moved motherboard out of the way)
6. pwned dfu mode and restore to stock 4.2.1 - got 10015 error and tried to kick out with tiny umbrella but just kept going back into recovery mode (with itunes logo)
7. add verbose boot using redsn0w - printed some kind of thread lr error
8. enter pwned dfw mode restore to custom 4.2.1 - got apple boot logo with spinning pinwheel
9. redsnow just boot tethered - got pineapple and then rebooted into apple boot logo
10. add verbose boot - same lr thread error

Is my 3GS completely bricked?? Any ideas?

Thanks

[iYeow]

What shsh blobs do you have ? Did you use redsnow to pwn dfu ?

[shivangp]

When I did a save all shsh in tiny umbrella it gave me shsh from 4.0 to 4.21.

I did use pwned mode everytime I did a restore.

[iYeow]

Put your iphone into recovery mode and restore to stock fw of 4.2.1
Make sure you have itunes 9.2 to 10

[shivangp]

By recovery do you mean with the iTunes logo on the screen?

I have the latest version of iTunes 10.1 - is there a reasons why I shouldn't use 10.1?

[iYeow]

10.1 is fine. If you want to stock 4.0, use the tss server from Tiny Umbrella to help you verify your 4.0 blob. Restoring to stock fw does not require special dfu, just a normal recovery or dfu mode will do.

[shivangp]

I ran RSS server and put phone in regular DFU mode and did a restore with 4.0 firmware - got a 1015 error from itunes and phone was in recovery mode - I used tiny umbrella to exit recovery mode but it still stuck on apple boot logo with spinning pinwheel.

Any other suggestions?

[iYeow]

This is weird ? It should boot up into Emergency screen.

[shivangp]

Yeah I'm not sure whats wrong is there something I can do to narrow down whats wrong?

[iYeow]

You never had this problem before you upgrade , right ? Try one more time, if you don't need unlock, restore to stock 4.2.1

[shivangp]

nope

I put phone in recovery mode and here's screen shot from tiny umbrella:



Here's output form iRecovery:

iRecovery_SVN>iRecovery.exe -s
iRecovery - Recovery Utility
by wEsTbAeR-- and Tom3q

Got USB
[NAND] Found Chip ID 0x3295DE987A54 on FMI0:CE0
[NAND] Found Chip ID 0x3295DE987A54 on FMI0:CE1
[NAND] Found Chip ID 0x3295DE987A54 on FMI1:CE8
[NAND] Found Chip ID 0x3295DE987A54 on FMI1:CE9


=======================================
::
:: iBoot for n88ap, Copyright 2010, Apple Inc.
::
:: BUILD_TAG: iBoot-889.24
::
:: BUILD_STYLE: RELEASE
::
:: USB_SERIAL_NUMBER: CPID:8920 CPRV:14 CPFM:03 SCEP:03 BDID:00 ECID:000000
C3CA1AA34D IBFL:01 SRNM:[88925Z3U3NR]
::
======================================

[FTL:MSG] Apple NAND Driver (AND) RO
[NAND] Found Chip ID 0x3295DE987A54 on FMI0:CE0
[NAND] Found Chip ID 0x3295DE987A54 on FMI0:CE1
[NAND] Found Chip ID 0x3295DE987A54 on FMI1:CE8
[NAND] Found Chip ID 0x3295DE987A54 on FMI1:CE9
[FTL:MSG] FIL_Init [OK]
[FTL:MSG] BUF_Init [OK]
[FTL:MSG] FPart Init [OK]
read new style signature 0x43313133 (line:405)
[FTL:MSG] VSVFL Register [OK]
[FTL:MSG] VFL Init [OK]
[FTL:MSG] VFL_Open [OK]
[FTL:MSG] YAFTL Register [OK]
yaFTL::YAFTL_Open(l:2725): CXT is not valid . Performing full NAND R/O restore .
..
[FTL:MSG] FTL_Open [OK]
Boot Failure Count: 2 Panic Fail Count: 0
Entering recovery mode, starting command prompt
(Recovery) iPhone$ printenv
(Recovery) iPhone$

I don't need to unlock so I just tried 4.2.1 stock restore from recovery mode with tss server NOT running. Got 1015 error so used tiny umbrella to kick of of recovery - phone rebooted but still in recovery mode.