The resistor is like a fuse in that case, to much power and it can be damaged.
1st you need to see what triggered this, it happened to me and the problem was 1 specific controler.
To check what is the blame without blowing out fuses, simply replace the resistor to one with a 0 ohm, or in terms you can understand, simply replace with something that will not make any resistance such as a plain wire (paper clips are good enough)
Assuming you feel confortable with soldering, simply replace and test the console.
Then test the controllers 1 by 1, if when connecting 1 controler, the image on screen, the fan, the ligths all start to fail (slowly) then that controler is the blame.
Usually the cause is a short circuit in a place that can't happen, when bending the controler cable, you may damage the protective layer overtime
, if by any chance the core of the wires touch, then a short circuit will happen and will zap all the power from the DC when connecting, that resistor inside the dc broke to prevent any damage to the console.
here's a pic of me replacing the old resistor (it's more like a fuse anyway, with such low resistance values) with a paper clip, since the paper clip can't be damaged then it was nice to see wich one of my controlers were damaged.http://img63.imageshack.us/img63/6736/2104071810.jpg