phone keeps waking up

[ou2mame]

i have no thing running, and the thing keeps waking up. i've tried everything, and it won't stay off. it'll stay off for a half hour or so, and then light up, for no apparent reason, with nothing running in the background that i know of. anyone know where i'd even start to diagnose this? its been doing it for about a week now, and it never fails. i had it sitting on my desk, and it just turned on again, so i figured i'd ask. i've been researching it on and off for a while, but haven't found any help so far.