[TarkaDaal]

I've just downloaded Alpha 5 (twice) and I can't get it to boot. The model B RPi is brand new, and I've had Raspbian booting off it. If I remove all peripherals (so it's just SD and power), I get the same result - red LED on, green LED blinks once, then stays off.

I'm using a high quality power supply rated at 5.25V, 2A: this one, in fact; https://www.modmypi.com/raspberry-pi-accessories/5v-2A-modmypi-raspberry-pi-power-supply

I've not modified anything about it - it's only been out of the box an hour. I'm trying to use it with HDMI/keyboard/WiFi attached, but as I say, it doesn't seem to boot even with no other devices attached.

Any assistance would be very helpful,
Dan