Hi Isobel, My name isXXXXX will assist you with your Samsung Galaxy Note.I am sorry to hear that you are having this issue. There are a couple of things that you can try. Please follow these steps> Remove the battery and then hold the power button down for 20 seconds, then reinsert the battery and hold the power button for 10 seconds. Let me know what happens please.
This is a tablet not a phone
did you get my last message, this is a tablet, not a phone
Okay, try this next please> press and hold Volume Up and Power Button at the same time until the device turns off . Also try holding the volume up and volume down at the same time while pressing the power button for 20-30 seconds.