On the underside are four small feet that look as though they are part of the case moulding. At least that's what I thought, and I spent a while trying to unsuccessfully prise open the case. After scouring around for help, I spotted some FCC internal photos over at Infodepot and noticed four screw holes in the base. Peering more closely I realised that the feet are actually plastic plugs cunningly disguised to match the moulding. Prise these out (they are not glued and come out quite easily using a fingernail) and remove the screws, and the top comes off easily.
And in case you're wondering, once you have the top off, this is what you will find inside:
|The inside of the EA4500 doesn't reveal much apart from the 6 folded metal antennas. All chips are covered by heatsinks|