Hi all,
My Xperia M4 won't turn on at all and when charging has a red light, which occasionally flickers. While charging, if I hold the power button it will stay constant. I tried using Power button + Volume up, but the Red light just began flashing. Nothing else. I tried the PC companion app, but my phone won't turn on so it won't detect it. I also tried different charging cables and plugs, charging the phone overnight, but the same problem occurred. This is my second Xperia M4, sent as a replacement for my last one which was stuck in a permanent bootloop, and I've had it for less than a month. It really seems like Sony doesn't care, because these forums are full of people looking for advice for similar problems. Are we gonna get any useful advice here Sony? 
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