Game Consoles are made to fail. We fix all of them. Some, however, are not worth fixing. We focus on the seventh generation gaming systems such as the PS3, Wii, and Xbox360. These still have a good chance to be worth it. We fix the Xbox 360 Red Ring of Death. We fix the PlayStation 3 Yellow Light of Death. Before your system has these problems try to follow a few simple rules: 1. Keep it clean! Make sure it is not sucking dust and debris into the heat sink. It will more than likely overheat the system. 2. Avoid standing it up. The centrifugal force on the disk drive will shorten the life of the drive. It really is designed to spin the drive flat to take the pressure off the motor. 3. Keep it well ventilated. The systems are prone to overheat.
Why do they fail? Most systems are made very inexpensively. Most of the systems were developed and manufactured with cold solder joints on many of the pads of the processors. Overheating causes these connections to degrade the signals and cause errors such as the red ring of death. Prolonged use of a system with these errors will damage the processors.
The lowest rate of repair for devices we see come through the shop is the Nintendo Wii. For more info about the consoles check out http://en.wikipedia.org/wiki/History_of_video_game_consoles_(seventh_generation).