[Q] galaxy y not booting topic

i am having a problem with my brother's galaxy y. when i press the end button, i get the galaxy y s5360 screen, but the screen goes blank after that. i am not able to enter the recovery mode or download mode. tried every method except usb jig.
about the phone: non rooted samsung galaxy y.


does anyone have any idea how to fix this? also, what exactly has happened to the phone??