If you get the S logo you need to wait for it to boot
Are you puting the phone into download mode, if so the android is all yellow looks like a road works sign
when it was flashing did you see a blue line increesing under the yellow android when it gets to the end the phone will reset
it will show the Samsing Galaxy then loads of txt and a little yelow android in the back ground after that it will reboot and show the S this can take a bit before it all loads
If you have not seen any of the above then somthing is wrong
To flash your phone needs to be in Download mode
Ok ok don't panic go back in to recovery mode and do another factory wipe when its finished in recovery mode pull the battery and wait put the battery back in and press the power again if the same thing happens re flash it souds like the boot loader is corupted this can be from before
If this happens the only other way is the odin method which is not as easy
shame you not near me this is deff the boat loader that was damaged with kies
To fix flashing back is needed
Shame yoiur not in Yorkshire i could of sorted it
One last question when you flashed did you put a tick in re partition as this could also be a boatloader clash
re patition removes the previouse corupt bootloader
