Now you mention it, I had an issue with the power supply myself (about six years ago if I recall correctly), someday it just refused to work. I ordered a replacement, the replacement was defective, got another replacement and it's been working ever since.
Back in the day it was well worth the effort to mod. Alternate dashboards, dongleless DVD playback, plenty of emus, XBMC, installing games on the HDD, etc
Agreed on Ninja Gaiden, it was somewhat difficult but not that hard and certainly a very enjoyable experience.