Remove the cover under the housing where the rubber feet are. To do this, completely unscrew the 4 Phillips screws with the rubber feet. You will then see a round battery (black casing with label: "CR2032-J045 3V") with a short red/black cable that has a very small plug. Both are right between the NVE memory latch and the side of the housing where the HDMI/USB/Ethernet/Power connectors are on the outside. Good luck, I'm sure you'll get it right. It's really not complicated. LG