Modules, systems, and methods are provided for cooling components of an inspection or testing apparatus, such as a borescope. In some exemplary embodiments, the modules include two heat sinks, with the top-most heat sink having a fan assembly approximately centrally disposed therein. The fan assembly can be operated to draw air into the top-most heat sink, and then exhaust airflow out of the top-most heat sink such that the exhaust air passes across at least a portion of the second heat sink to help cool both the first and second heat sinks, and components of the apparatus associated therewith, using the same fan assembly. As a result, the components of the apparatus can be cooled more easily, and the performance and efficiency of these components is improved, all while reducing the overall size and weight of the inspection apparatus.