The 1.8a Lisa PS is junk, I don't recall the exact problem with those but they went out all the time, I use to have some parts for them, but I am sure they are lost or trashed by now. Now the good news is the 1.2a is a good power supply, and everyone I've used had got really hot in that area, adding a fan would be a wonderful idea... Not sure why $10,000 didn't get you a PS fan... But hey