Hi there and welcome Richard
Can you tell me the make and model of your device please?
It's a Dell 7" TO1C now it turns on and shows the Dell logo then changes to a battery with a question mark in the middle of it.
Make sure it is powered off.
Then press and hold the power and sleep / wake button to turn it on
When the Dell logo appears the second time, touch and hold the menu button until Safe Mode appears.
Tell me if you can get this far please