Methods, systems, apparatus, and computer-readable media for providing a redundant power solution for an expansion card installed within a host computer. A page entry table contains attribute entries of the page. Any assortment of colors of LEDs and combinations thereof may be provided and programmed via the processor of the gaming machine. Since the proxy unit performs gateway conversion from IPP into another protocol, the client can print out to the print server circumventing the firewall by using IPP. The second conducting agent is an agglomerate formed of a conducting material and a fluorine-based polymer. The photodetector and a concave portion are formed on a semiconductor substrate, the light source is disposed at the concave portion on the semiconductor substrate, a slit is also disposed on the concave portion, and the light beam emitted from the light source irradiates the scale after passing through the slit.