Some more info on "cannot boot up" please.
-can you get to download mode?
-does odin or your PC recognize it?
If you can't do anything with it what so ever, your choices are limited.
1. The cheaper method. Did you get your carriers insurance? No? Well that sucks! Now you have to try and warranty your device. Maybe where you got it from will warranty your new found brick for ya. Maybe samsung will warranty it for you. YOU have to try. .
2. Some devices have a JTAG jig, or usb type device that will awaken a phone and put it into download mode. I haven't searched myself, but maybe one is available for your device. If so get one and use it. Put it in download mode and flash a stock rom with odin. This method has the potential of saving your brick a few times over! But not all bricks can be recovered using this method.
3.
Mobiletechvideos.com has a brick repair service. They will take your brick and bring it back to life! Cost varies and is around $60 us dollars. The service takes about a week from what other users have reported.