Posted 16 July 2012 - 10:20 PM
I ran into the same problem with my captivate. After a thorough research and following the tracks of another person with the same issue for about two months, reading tons of forums and trying every possible recovery method, had to gave up.
My story, happened on december 2011:
I was trying to make the cache partition bigger since it was only 30MB, and couldn't download certain apps from market. I ran a couple of scripts that did not work and finally came across a a script which i ran through terminal and fixed the problem. Some 4 days later, the phone was stuck. I had to pull the battery and restart it. It restarted at the "1st time use wizard", as if it came from factory. The same thing happened, no memory, despite de OS able to boot.
After trying several methods of fixing the issue (flashing, reflashing and them some more flashing), it got stuck at boot with messages like "SDCARD could not be mounted", "No SDcard detected), "mmcblk01 not recognized", and the sort.
Turns out, apparently, the partitions are messed up to a point where its no longer "fixable", and flashing any "pit" file (file with partition info) won't work. Problem is I never quite understood how partitioning works on the phone, as well as how the memory is setup, things as "bootloaders" never understood it. Aside from knowing the first 500 MB are for OS, 500MB-2GB for applications, and the rest, 2GB-16GB as internal storage. I would need some sort of drawing or graph or something to understand it, for example when you used DOS and the first 640KB where the "main memory", from 640KB - 1MB "upper memory", and from 1MB and upwards, extended or expanded, and you could easily illustrate this.
Not to be disheartening, but after reading tons I wasn't able to find a working solution, and most of the people with this problem were adviced to return it for warranty, or to buy a working capivate with cracked screen and exchange motherboards (as well as the IMEI info sticker). I went for 2nd option since I had no warranty on my device.
I can still claim that i bricked the "unbrickable captivate", until proven otherwise, and without attempting the hardware "unbrickable mod".