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2017-08-15 04:14 AM
Had this issue with a Z5 after the battery ran flat. while on charge (any power source will do) hold the power button + volume up until it vibrates.
2017-12-08 02:42 AM
my phone Xperia z4 has been switched off suddenly and I kept charging more than 3 hours but also it's showing red colour only. what would be the reason any battery problem nor any other problem??
Same here. This is a known issue with Sony. I got mine working again after keeping it plugged for 3 days. It started to turn on.
Now it's dead again. I will try to keep it plugged again maybe it will go back alive.