My Sony Xperia tablet Z SGP311 had a problem with the charging port, after replacement by a new one, the battery now is fully charged but the tablet wouldn’t start!! The only sign of life is when connecting the charging cable, so the screen stock in blank just after the logo screen and the 100% charged battery screen.
I’ve tried all the ways to reboot it, but nothing worked, power + volume up, power + volume down, power+ 2 volume buttons or even disconnecting the battery!!
It seems like that the power button is not working! But even with connecting the power cable it’s not working!!
Great !!!!! I changed the “Antenna Flex Cable” and “Wi-Fi Antenna” at the same time, they weren’t so expensive (less than 5 € both), and finally my WiFi, GPS signal and Bluetooth worked again. ouf !!! it takes me a while thinking to fix it myself, BUT fortunately I came here to ifixit.com and everything goes fine.