Your Slate may with a drained battery. Charge the Slate completely using the USB cable provided in the Slate box before activating the Slate.
Charging the Slate
Your Slate can be switched on or off while it is charging.
Charge the Slate by connecting it to a Mac or a PC using the USB cable provided in the Slate box. Do not charge the Slate by connecting the USB cable directly to a wall outlet.
While the Slate is charging, the upper LED blinks orange. When the Slate is entirely charged, the upper LED will shine orange continuously:
Disconnect the Slate when you have finished charging it.
The Slate charges completely in 3 hours when it is switched off, and in 4 hours when it is switched on or in use.