This image shows a person is fixing a over heated PS3 and applying heat sink on it so that it does not get over heated due to heat sink. Generally all microprocessor have heat sink on to make it cool down. There are many kind of microprocessor and all have their different use this image show it is microprocessor of computer. It haves heavy duty long life capacitors to run microprocessor. After applying heat sink it connect with fan some processor have fan and some are does not have fan it just apply only aluminium metal so that heat can easily transfer to metal and cool down.
Check out the tutorial:
PS3 Red Light tutorial