Sony Xperia Z4 Tablet - Red, Green flashes - No PC connection - No Charge

[gab90]

Hi,

My Sony Xperia Z4 Tablet has these problems:

- No connection to PC  >  Nothing happens.  (Only connection beep, nothing else. I tried Vol.Down or Up then USB etc.)

- Connecting to USB charger  >  Nothing happens.

When Powered OFF:

- Connecting to USB charger  >  Vibration, Red and Green flashes but nothing happens.

- Power button + Vol. Up  >  Vibration, Red and Green flashes but nothing happens.

- Forced Shut Down (Memory card slot OFF button for 120sec)  >  Vibration, Red and Green flashes but nothing happens.

RARELY after repeatedly Force Shut Down "Vibration, Red and Green flashes" these happens RANDOMLY:

- Red LED lights up and charging very-very slowly (2 days ~ 23%) (In this case the upper right quarter of the tablet is warmer.)

- Red LED lights up but NOT charging at all.

- Red LED lights up, display is black and backlight dimly lit but NOT charging at all.

Any suggestions?

Thanks in advance!