Burngate wrote:However adamant you are that your power supply is perfect, nobody is going to believe it isn't a power problem until you measure the voltage on the test points.
If it hasn't booted, the Ethernet LEDs won't light up, and nothing will appear on your monitor.
If it starts booting, the green LED will flash; if there's no flashing green LED, then the Pi isn't reading the first files from the card - bootcode.bin, then start.elf.
So has your card got those at the top level, according to whatever computer you used to install the OS?
Power problems could be the supply, its lead, the connector, the polyfuse. So measure the voltage on the test points
I understand your point. The thing is I find it hard to believe that two different power supplies (that has been tested and working earlier with the Pi and with other components) would suddenly stop working over night.
The SD card is as properly configured as you can according to the specific tutorials for each OS I've tried with. I've just tried to build the OpenELEC latest release (4.0.4) myself to make sure it's proper and it doesn't want to boot from that either.
The power adapter (the PiHut one) supplies 5v & 700mA according to my multimeter... That should be enough, right?