[Q] I9300 stuck at Logo, only donwload mode working topic

Hi Experts,

I have an international S3, it was running on SlimRom, was working just fine, 2 days ago it was rebooted itself (it was lying on the table), and stuck at samsung logo. I cannot enter into recovery. Only download mode is available. I've tried to flash stock firmware and recovery via Odin, both ended with NAND writing fail..

Does anyone has any idea how to fix this?

Thanks