Note that some of the 2600 consoles had (very slightly) different lengths of screws, and putting them in wrong would tear up the traces on the board. http://www.atarimuseum.com/videogames/co...

I've seen triwing screws about that size before, in the old compact flash sized disk drives made by IBM (now Hitachi Global Storage). I want to do a teardown of mine, but I too will have to make my own tools to do so.

The little 8-pin chip by the RF shield is a 555 timer, used to make the "beep". It's connected to the Q output of the 1802, and seems to have some droop to it, so instead of "beep", it's more of a "byoop".