I've also reset camera and shooting settings to default reset and tried self timer. No beep.
Taken the camera into the dark closet and still no af illum. I am amazed, however, how little light is needed for it to focus correctly and at one time wondered if they used an IR beam instead of white light. Covering the 'headlight' doesn't affect dark focus.
It just might be that both items are on the same flex circuit and/or not plugged in, which is why I ask, where's the beep hole? Near the headlight?