Samsung logo loop in galaxy y
This is a solution that is specific to Samsung devices. This will only work if you have soft-bricked your device. It is pretty simple to build and can get you into download mode on most Samsung devices, just have your ROM ready to flash and you're good to go!


http://www.xda-developers.com/android/need-a-samsung-usb-jig-build-your-own/


Here is the actual YouTube video that I used to make mine:


http://www.youtube.com/watch?v=Rdn5GoRjhn0