White screen everywhere... topic

Hello, i have gsmart g1345 and i was porting rom from Samsung galaxy mini (Same chipset), it worked for about 8h but then white screen appeared, i cant go to recovery, i cant see even bootloader logo, just white screen. I can connect it via USB and use ADB/Fastboot, can i revive my phone? Ive tried also flashing stock firmware but it doesnt appear to work