xperia z2 won't turn on - Xperia Z2 Q&A, Help & Troubleshooting

my phone is rooted with Z2-lockeddualrecovery2.8.26
but today it start to turn off after each call
when i get home trying to turn it on it won't start, tried flashtool but no respond when i connect the phone while down volume key is pressed.
when i connect to charger the red light turn on for few seconds then show the Sony logo screen and stuck there no respond to power button and the red light is off while it's stuck on that screen it doesn't even showing charging as it suppose to do while the phone is off
when i press volume up key + power key the screen goes off and the red light is on but the screen won't turn on when i press the power button again
any one with an idea to fix it?
update: ok after many tries i been able to flash it with flashtool with that D6503_23.5.A.1.291.ftf
but still can't turn it on
when i connect the charger it show charging like 18% and when i leave it for while it show 0%
i disconnect the charger try to open nothing
then connect the charger again it shows 25% and i leave it for few seconds then it shows 100% but when i try to press the power button it shows empty charging battery icon while the phone is still off
what could be the reason ?

ok i manage to flash it with stock firmware
but still turning off randomly or restart randomly
and when it turned off i can't turn it on again unless i connect it to charger and when i do it keep blinking red led and sony logo on and off
is that hardware failure or battery failure or software failure ?

ok every one i have solve it ,
it came out to be faulty battery

@pharaon said:
ok every one i have solve it ,
it came out to be faulty battery
Click to expand...
Click to collapse
Sorry for delay, as you said, It's faulty battery.

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Osaid69 said:
I have Sony s and when Im installing a cm12 In recovery the phone turned of cuz no charge
And now I can't turn the phone in all ways
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Click to expand...
Click to collapse
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