VGN Series. Turn on Hardware Switch for WLAN

For the Sony VGN-AR700 series (AKA PCG8112L), accidentally turning off this toggle switch will disable the "WLAN" (AKA WiFi or Wireless). It is located on the lower right side, on the front-facing edge of the keyboard base, to the right of the SD card slot. Despite many user comments on the Internet asking how to turn on this hardware switch, Sony.Com does not seem to have answered this question.