An apparatus and method for storing data related to service of an electronic device, in particular, an apparatus and method for automatically storing information concerning the first use date after purchase for verifying the warranty period of the electronic device. Part of the information lists an authorized person that may remove the micro-chip. Contact probes in accordance with the present invention can be applied to a phase change media, for example, to form an indicia in the phase change media by changing the electrical resistivity of a portion of the phase change media. Upstream and downstream static pressure sensing ports are respectively provided on opposite sides of the flow impeding plate. The client computer monitors the signals from the service programs and determines that a failure has occurred for a particular test job when the corresponding signal is undetected.