Two of my 9100s had no screen display, yet seemed to boot- so took the top case off and starting probing with the voltmeter. Found +5 and +12, but when I checked the +70 there was nothing on one, or very low on the other - and one machine had a bit of a burnt smell to it. That machine blew a tantalum surface mount cap, shorting the output of the switching supply that generates the +70 as well as the isolated +5, +12, and -12 (there are relative to the "E" test point lug). This also took out the driver transistors - which Digi-Key still stocks (bought ten to be safe). To reduce the risk of future damage I lifted the end of the choke coil that was closest to the power connector and installed a 20mm fuse holder in series with it and installed a 1A fuse there in the hopes that the fuse will blow before the system smokes up when the next capacitor shorts out - note I checked all the tantalum with the ESR meter and the rest on all my 9100s check fine. I'll make up a page on this with pictures in a few days and jam it up on flippers on the fluke.html page. John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org Archive site: http://seven.pairlist.net/pipermail/techtoolslist/