oh oh
uh uh
no heartbeat?
time to send for warranty

it seems that your phone motherboard faulty like other unlucky owners

can you describe more about the incident?

was your phone being charged overnight and next morning found it not turning on anymore?
was your phone running stock rom/firmware?
what was your phone purchase date?

bear in mind that increasing the charging rate will shorten the battery life span. you need to make a balance between charging speed or battery life span.

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Added on December 3, 2012, 5:29 pm

bro, you are 1 of the unlucky owner
check this xda thread, a lot of international owner had their phone suddenly dead
http://forum.xda-developers.com/showthread.php?t=1993044

a lot of them were charging overnight and next morning phone dead, and right before the phone dead they saw LED blinking blue but screen wont turn on regardless of any button pressed. once removed battery then they couldnt turn on the phone anymore.

some of the users saying their phone act weird, slow, lag before the phone dead, did you overcome any of these symptoms?

most of the dead phone were running Jelly bean 4.1.1 or stock based custom rom (like omega wanan or ARHD), but there were also some reported running on ICS or AOSP rom, so it seems not related to rom.
a lot dead phone were actually first batch phone with the sticker stating "Made by Samsung"
do you mind to check where did your phone made from? take off the battery, check whats written on the sticker.
i am sorry for your lost..

long time no see
where is ur hometown?
I try to help u find out