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My battery on my xperia T ran flat I've not been able to turn my phone on at all tryed holding volume down and power on for 8 seconds the waiting an hour which didnt work and other help will be helpfull.
Try leaving it on charging (via wall socket) for an hour or two then try to turn it on again.
my phone was on charge for at least 8 hours all night and sill nothing
Try holding both on/off and volume up and check if you can feel any vibration.
i held those keys until it vibrated three times its sitting on charge
If it vibrates three times in a row, it should now be turned off completely. Now try to turn it on as normal again.
Is the notification LED shining in any color?
it vibrates three times then i try to turn it on but nothing happens at all and sometimes the red led comes on when i press the power button most times no
If possible you could try using another charger and cable.
Its possible that the phone isn't getting enough power and that there might be something wrong with the charger or cable.
i am trying that still nothing when i switched the phone on, the red led came on for about 5 seconds then went it didnt go as far as the sony start up menu
In that case I think that the phone needs to be examined at a repair center to get it fixed. Contact your local support team for more information on how to proceed.
http://www.sonymobile.com/global-en/support/contact-us/contact-info/