Xbox 360 error code 0102, also called Red ring of death, is an error that usually occurs when your hardware is messed up.
1. Send Xbox 360 to a Service Center
"Xbox 360 error code 0102" may be due to a CPU, GPU or Memory chip semi-detach from the Xbox 360 mainboard. The detachment is unnoticeable because a chip has many solder joints. If one of this solder joint is broken or detached, the chip will malfunction. The detachment may be caused by overheating. Solder joints are soldering lead that melts when a specific heat is meet.
So if you have encountered an "Xbox 360 error code 0102," rather than fixing it temporarily, send it to Xbox service center for a warranty claim or repair. If the warranty is null, some technician could fix this by reflowing/reball chips.
2. Temporary fix
“Xbox 360 error code 0102” may be due to a CPU, GPU or Memory chip semi-detach from the Xbox 360 mainboard. As stated above, a solder joint broke when it meets a specific heat. However, the solder joint can be fixed by applying heat. If you are on a low budget, and your Xbox 360 is out of warranty a temporary fix can be done using the solution 2 of this link here. However, this could break your Xbox 360 too.