HI there folks, my first post here. I am trying to track down issues with a derelict MacPlus, in what seems to be a power supply issue. It was making the flup flup noise quite strongly, now is only making a slight tick sound to the same rhythm. Checking pin six (blue wire) on the cable from the PSU to the mobo shows 25vac, where as i understand it this should be the 5v DC line... Any pointers would be appreciated!