Sony Xperia T3– Current consumption is only 70mA when pressing pwr button

Please help.

I have already the third play of the same symptoms .
The phone is dead , he not fell and was not flooded.
At the time when I press the switch power on the phone takes about 75-80 mA , and so is .

Very please advice , it has to be a common fault , since I have already 3 such a phone with these symptoms