When you hit the power samsung logo flashes normally then screen goes blank. At this point it keeps making that powering on vibrating sensation repeatedly. Touch power button and this routine repeats.
It will not boot into recovery. After the sammy logo flash continuing to hold down power +/- does not yield recovery mode. It just starts the vibrating loop.
I thought I will just install stock via kies or flash JB via odin. Well odin mode turns on ok but shuts off after barely 2 to 3 seconds. I have tried this with and without battery, plugged in and not plugged in on pc but end up the same way.
I have checked battery, same is super aok. I swapped batteries with my i717 and mine turns on just fine all the way. My buddy doesn't mind any which way the phone comes back to life.