So, anybody here know what's up with this? The phone belongs to my sister though, it suddenly just happened this morning when she was trying to switch the phone on(because she normally switches the phone off before sleeping). I could boot the phone into Odin mode, I wanted to try flashing a stock firmware according to the guides I found on XDA. Onto the first step, my Windows Defender was telling me that the file I downloaded from http://odindownload.com/ has virus. That's where I stopped, because I don't want to have any further damages to be inflicted onto my computer. I've also tried searching around for a solution and to understand more through Google, the results returned are mostly telling me that it might be a hardware failure.

Looks like the phone is finally giving up, no?