The present invention comprises an implementation of a variable data TPI hard drive system. The wall adapter permits a mullion to be secured to a wall through the wall adapter without the need for trimming or caulking. Accordingly, it may be beneficial to increase the resolution of an apparatus for phase-contrast imaging without further reducing the area of an individual pixel element. The electronic appliance control also preferably records a specific series of diagnostic steps taken to verify replacement of only an actual faulty component.