The previous owner claims updating to 4.4.2 via odin gave him issues, "black screen of death". I managed to root it, philz it, and installed aosp rom fine. But touchscreen doesn't work at all, not even in philz touch.
Another problem is touchwiz roms dont work at all (as said above, the give you blank screens). If i'm on aosp rom instead, I can't install aosp kernels.
Ideas? I'm really mad atm, wasted whole day on this ****.