RE: Latitude 12 (7275)
This is a latitude 7275 so is attached to a keyboard, but keyboard it detachable and does not seem to power on when laptop/tablet it powered on, so that I cannot use the F2 key.
When I press the power button, it vibrates the tablet and LED in power button goes on. Then nothing.
When I press the VOL down, and power on, the screen flashes white (full screen), then red, green, blue, back to white. It does this approx 3 times then powers off.
Thanks for getting back to me.