I decided to start my phone with a clean slate and un-root it via installing the stock firmware I9300TDUALF2_I9300TVAUALF2_VAU
I've done this before and it's never been a problem, but now my phone will not start up properly. It gets to the Samsung flashing logo in the boot animation and just stays there forever (literally).
I tried 2 (from sammobile & androidromupdate) other different Australian firmwares and still the same thing.
I've flashed CF-Root on the phone, booted up into recovery and installed a few different custom ROMs but the same problem occurs, it just stays put on the boot animation for eternity.
Normally I'm able to work out this sort of thing but I'm at a loss this time
EDIT: Forgot to mention,
#1.) The startup sound plays during the boot animation if that makes a difference.
#2.) I've tried flashing it from 3 different PC's, with both Odin v1.8.5 and v.3.07
#3.) When I flashed Foxhounds ROM, The whole install ran through fine (Aroma) so I don't think this is a file integrity issue.
#1.) The phone feels warmer than usual (not hot, just warm, warmer than it normally is when idling) during the infinite boot animation