My uncle was trying to update his Galaxy S via Kies in Windows and the update failed while installing and he was left with a brick, could only boot into download mode while holding down vol down and power buttons or yellow sign with exclamation if only pressing power.
So he gave it to me to unbrick and I use a Mac so I downloaded Heimdall and XXJVU
(2.3.6), device was detected by Heimdall and so I proceded with loading that package and this is what I got:
ERROR: Failed to confirm end of PIT file transfer!
PIT upload failed!
The screen went black and now the phone is completely dead, I've tried removing the battery, the USB cable, and different combinations of either or plugged in while holding down various combinations of buttons and cannot get the phone to show any signs of life whatsoever.
Uncles phone was a SGS Captivate from Rogers Canada and prior to his failed update it was running 2.2 Froyo
*UPDATE: Pulled battery and removed cable for several minutes, also pressed the power button and held it in for a minute to discharge any remaining power...replaced battery and held vol down + power button and I'm back in download mode