G5 Imac 17in ATX Power Supply Conversion
I recently acquired a 17in G5 Imac that was missing a power supply and a hard drive... hard drive was no problem... got a terabyte hard drive (bigger, better, faster right)?
I am moving on to the power supply... I looked for weeks and the cheapest power supply was approx. $100... I am not paying that much for a freakin' 250 watt power supply!!!
Anywho... I do not want to fry a perfectly good Imac so I used my googlefu and found the following links... the problem with them all is that some of them mention that an ATX power supply does not have the 24v power rail needed for the screen... and that I need a power supply with a +12v and a -12v to make a 24v rail to power it... I can't find anything confirming/denying this.http://www.jimwarholic.com/2008/11/apple-imac-g5-power-supply-issues-and.phphttp://pinouts.ru/Power/atxpower_pinout.shtmlhttp://forum.insanelymac.com/index.php?showtopic=47788http://forums.macnn.com/58/imac-emac-and-mac-mini/353353/imac-g5-power-issues/
I am planning on taking an dead power supply and cutting off the connectors and making an extension that way i can reuse the power supply if needed... the good power supply that I am going to use is a 500watt antec power supply (model BP500U). It has a +12V rail rated at 18A and a -12V rail rated at 0.5A.
To get the required 24V to run the internal monitor I am planning on cutting off the insulation on one of the 12V rails and soldering on the other 12V rail and then re-wrap with electrical tape.
What I was wondering is that can anyone find a more definitive guide to doing this... preferably with the instructions on how to get the internal screen up and running with (if it is really) 24V?
Anyone see any flaws in my plan (or suggestions/comments)? Like I said I do not want to fry my new toy and any help would be appreciated.
Thanks in advance ya'll.