It is stuck on a screen where the word kobo arc is held. The led is flashing blue. It has been like this for half an hour
Hi there Hattie. Press and hold power button to go out of the screen where you are stucked. Then try to turn it on again by pressing the power button for about 20 seconds. If that doesn't work, look for a small hole at the back of Kobo Arc, it's the reset button, use a paper click or anything that would fit it and press the reset button for 5 seconds. Then try turning it on again.
Please let me know how it goes. Good luck!