Just a little background on how I discovered the 54420 error and why I think it is valid. Sometime last year after MS instigated the 3 year warranty, I tried to get an RROD box repaired and that I didn't realize was banned. Whenever I clicked the Request Repair button on the website, I would get a vague error message that was completely unhelpful. After getting this message repeatedly, at some point I looked up at the URL for the error page and noticed that the returned string actually had "error=ban" inside it. At that point it finally dawned on me that the console had been hit during an earlier banwave. I filed this little discovery away and when the current wave hit, I tried the same procedure on a recently modded 1.61 machine and saw a similar error screen. This time, however, the URL said "error=54420". Guessing this was the new code for banned consoles, I posted this as a safe way to check for bannings and immediately people began confirming it. While it may be true that the 54420 error is a catchall for several issues that give MS an excuse not to fix a console, in most cases it has to be indicative of a ban.