Hi guys, I have a Galaxy Tab 3 8" which is dead! I have trawled the internet and seen and tried all the usual tricks (holding in the power button, holding the power button and volume keys for 30 seconds etc etc). I have taken the unit back-panel off and have 4.5v on the disconnected battery - so the battery seems good! I have disconnected and re-connected the ribbon for the power-button to rule-out this as an issue. But still no power. Anyone any ideas? Please!