You’ve started up your system and found Xbox error 0102. What does this mean? Error 0102 indicated an error with the “digital backbone” of the system, which means the CPU, GPU and RAM. This is a pretty serious error, and it takes a bit of a tricky fix, but it most definitely can be fixed.
First of all, it is highly recommended that if your Xbox is still under its warranty, that you simply send the system either back to the store you bought it from or alternatively just send it right back to Microsoft. With a fix like this, if it’s free, you might as well let the pros do it. Unfortunately, you’ll probably be without your system for at least a month. If your system’s warranty period has expired, then your options are pay someone else to fix it, or do it yourself. Paying someone else to fix it might be a slightly safer option, but it’ll probably cost you and arm and a leg. Realistically though, you’re probably just as qualified to fix the system yourself, assuming that is, that you go online and get a good repair manual to follow.
This problem is often caused by a cold solder joint between the main-board and the GPU. Fixing this deals with opening the system up and either fiddling with the “x-clamps” that hold onto the chips, or re-heating the chips. Both of these are pretty tricky, so again, if your system is under warranty, send it off. This way you’re absolutely guaranteed a successful repair.
If you do decide to take this repair on yourself though, remember to do your research thoroughly! Read up on the info available on the net, and get yourself a good Xbox 360 repair manual. Armed with the right knowledge and a bit of skill, you may very well be able to fix this yourself.
by Randy Rhoads