I have acquired a large number of xboxes in the past few years. I am now looking at the rgh hack and am going to try to perform it with y brother later this week. When testing all the xboxes, one that had red rings no longer has them and one that didn't now does. It is giving me error 0021, which I checked the guide and it says either DVD drive timeout or cold a solder somewhere to the gpu. I assume its the second one because I don't have a DVD drive hooked in and it still gives me the error. I tried all (4) of them without DVD drives and all work fine, excluding this one. So my question is, how would I go about fixing this issue?