Hi,
... I would leave the A4000 on for at least a half hour, then try rebooting. If the A4000 has been sitting for a while without being turned on, somethimes it has a hard time starting (at least mine does) after I leave it turned on for a while turn it off then turn it on, it starts right up.
Same thing with my A4000T.. If its been unused for a couple of months or so, it just won't boot up properly. Leaving her to warm up for a while, then starts like nothing ever happened.
