Path: news.uiowa.edu!hobbes.physics.uiowa.edu!math.ohio-state.edu!uwm.edu!biosci!news.alaska.edu!jesse2.gi.alaska.edu!user From: jesse@dino.gi.alaska.edu (Jesse P. Atencio) Newsgroups: comp.sys.apple2 Subject: Re: //gs Power Supply questions/problems Date: 9 May 1995 21:54:04 GMT Organization: University of Alaska Computer Network Lines: 27 Message-ID: References: <3ok896INNi4o@england.cis.ohio-state.edu> NNTP-Posting-Host: jesse2.gi.alaska.edu In article <3ok896INNi4o@england.cis.ohio-state.edu>, forest@cis.ohio-state.edu (Forest Hursey) wrote: > I am having some problems with the power supply on my //gs ... it > makes a loud whining noise that increases in volume when a drive is > accessed or there is a heavy load on the processor and sometimes it > just shuts off and refuses to turn on again. If I shut it down it > "chirps" rapidly and then dies down slowly. > > I suspect a bad transformer since I have heard this chirping problem > thousands of times on Mac+ that have had flyback tranformers go bad. > I was wondering if anyone elses has had this problem or experienced > anything similar. > Should the //gs power supply be able to handle this ok ? Forest: Your //GS power supply is certainly overtaxed right now. The accelerator by itself draws quite a bit of power. The sound you hear is certainly a sign that your power supply cannot handle the load. The chirping sound is most likely a bad capacitor, not a transformer. The failure is caused by the increase in heat. You should get a heavy duty GS power supply from someone like ABC Direct. They sell the Applied Engineering heavy duty supply. Call them at (800) 481-6782 or send them e-mail at ABCDIRECT@aol.com for a catalog. They carry the entire AE product line.