OK so I've bought a Pi for son's birthday and am trying to test it out.
I have it connected to a USB mouse and keyboard and a standard flat screen monitor using an HDMI adapter
I bought an SD card with Raspbian pre-installed. I've pushed it as far and as hard as it will go.
I powered up the Pi and I get a red light and occasionally a green flashing light for a while but that stops and then no more. Any clues please?