[Hardware Hacking General] AdamOutler:
I've got a Captivate brick here...

This one bricked from a mismatched PBL/SBL combo. i9000 PBL on it and a SGH-i897 SBL.

Here's a UART log.

+k�́Co., Ltd. 2006-2010
-----------------------------------------------------------

+n1stVPN 2688
+nPgsPerBlk 64
+n1stVPN 3008
+nPgsPerBlk 64
PBL found bootable SBL: Partition(4).

Main Menu
--------------------
--HEX OUTPUT--
`-toggle hex output
--BAUD RATE--
a-115200
b-57600
c-38400
d-28800
e-19200
f-14400
g-9600
h-4800
i-2400
j-1200
k-300
Select one, press enterHEX Output toggled
HEX Output toggled
HEX Output toggled
........

|D6|D1|C9|BD|B9|A5|8D|CD|81|43|6F|2E|2C|20|4C|74|64|2E|20|32|30|30|36|2D|32|30|31|30|A|D
SERIAL1: � � � ֽ � � � � ́ C o . , L t d . 2 0 0 6 - 2 0 1 0
|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|A|D
SERIAL1: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|A|D
SERIAL1:
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|32|36|38|38|20|A|D
SERIAL1: + n 1 s t V P N 2 6 8 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|33|30|30|38|20|A|D
SERIAL1: + n 1 s t V P N 3 0 0 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|50|42|4C|20|66|6F|75|6E|64|20|62|6F|6F|74|61|62|6C|65|20|53|42|4C|3A|20|50|61|72|74|69|74|69|6F|6E|28|34|29|2E|A|D
SERIAL1: P B L f o u n d b o o t a b l e S B L : P a r t i t i o n ( 4 ) .
|AB|8D|D1|C9|BD|B9|A5|8D|CD|81|43|6F|2E|2C|20|4C|74|64|2E|20|32|30|30|36|2D|32|30|31|30|A|D
SERIAL1: � � � � ѽ � � � � ́ C o . , L t d . 2 0 0 6 - 2 0 1 0
|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|A|D
SERIAL1: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|A|D
SERIAL1:
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|32|36|38|38|20|A|D
SERIAL1: + n 1 s t V P N 2 6 8 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|33|30|30|38|20|A|D
SERIAL1: + n 1 s t V P N 3 0 0 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|50|42|4C|20|66|6F|75|6E|64|20|62|6F|6F|74|61|62|6C|65|20|53|42|4C|3A|20|50|61|72|74|69|74|69|6F|6E|28|34|29|2E|A|D
SERIAL1: P B L f o u n d b o o t a b l e S B L : P a r t i t i o n ( 4 ) .
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|32|36|38|38|20|A|D
SERIAL1: + n 1 s t V P N 2 6 8 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|2B|6E|31|73|74|56|50|4E|20|20|20|20|20|20|20|33|30|30|38|20|A|D
SERIAL1: + n 1 s t V P N 3 0 0 8
|2B|6E|50|67|73|50|65|72|42|6C|6B|20|20|20|20|36|34|20|A|D
SERIAL1: + n P g s P e r B l k 6 4
|50|42|4C|20|66|6F|75|6E|64|20|62|6F|6F|74|61|62|6C|65|20|53|42|4C|3A|20|50|61|72|74|69|74|69|6F|6E|28|34|29|2E|A|D
SERIAL1: P B L f o u n d b o o t a b l e S B L : P a r t i t i o n ( 4 ) .
|B9|9D|81|45|6C|65|63|74|72|6F|6E|69|63|73|20|43|6F|2E|2C|20|4C|74|64|2E|20|32|30|30|36|2D|32|30|31|30|A|D
SERIAL1: � � � E l e c t r o n i c s C o . , L t d . 2 0 0 6 - 2 0 1 0
|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|2D|A|D
SERIAL1: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

This one will trigger boot when the Vol+ and Power keys are held. This is a reset sequence on the captivate.. Is it the same on the i9000? Looks like the keys are in-tact.

.... more to come on a SIM port analysis