Chosen Solution
I have a Samsung tab SM -555.The battery is still good but sometimes (a few times) I found it switched off and I dont know why (olso if I think the problem maybe can be the mini usb.One time after switching off the tab wont witch back on but afer “mooving something in the mini usb " I was able to power on again and use it (before I was able to power n the tablet only if the tab was connected at the charging cable). I think that it can be a false contact in the mini usb.Who can tel me the the order and functions of the various pins in the tab t555 mini usb? Thank’s Claudia ps: atm the tablet is working fine but maybe today,maybe tomorrow recharging it I will get back the same trouble :/
Check the charging port for debris and use something like a toothpick to clean it out. Shining a flashlight into the power will make it easier to see if it’s physically damaged or blocked.