SGS switched off halfway through a YouTube video and now I can't switch it on
Earlier this morning, I was halfway through an episode of Air Crash Investigations on YouTube when the screen just went black, in an instant. It switched off.
At the time, my earphones were plugged in, as was the charger (battery stood at ~85% charge).I tried switching it on. Nothing happened. The phone was absolutely dead. I tried entering recovery mode and download mode but couldn't, my phone simply wouldn't switch on.
I then tried switching battery but it's still not turning on. The phone is absolutely dead.
If this were to happen when flashing ROMs, it might have made sense (e.g bricking the phone by flashing the wrong ROM) but this was nothing like that. I was simply watching a video on my phone! The last time I flashed a ROM was over two weeks ago.
I was on CM11 using the stock CM11 kernel without any overclocking whatsoever if that helps?
I'm convinced this isn't a battery issue since I've tried two separate batteries, both of which aren't empty. Is my phone now bricked? I can't switch on or get into recovery/download.