A method and system for detecting slant edge areas in an image comprising a plurality of pixels, and for preventing zigzagged slant edge artifacts in an image detail enhancement process. The device contains one or more removable modules that provides the user with the capability of quickly and easily removing one or more of the modules without the need for replacing or removing the entire unit. PID data is obtained from prior serviced vehicles having same vehicle specifications as and under substantially similar operating conditions as the current serviced vehicles. The discharging controller comprises an ESD connection unit, and a voltage clamping unit.