Re: Apple iMac G5 2004 PSU gone

I'll try to describe better: there was a kind of black halo (10-15mm) on the metal shield which is just on the back of the iMac, the one collecting hot from motherboard. This was in corrispondence of one of the caps I've replaced with pins just a little longer then other ones. My hypothesis is that made the short circuit. I'll try to make a picture of it but not much of it will be visible since I've replaced the cap again with a hopfully working one. ..BTW which a correct way to check a cap?

Re: Apple iMac G5 2004 PSU gone


I think I did it. Pressing the motherboard small button which rest the electric management and then pressing the force start nearby. But no good news. Any further thoughts? Thanks to you all....

Re: Apple iMac G5 2004 PSU gone

It was not as simple as replacing the PSU... a new one was installed but same symptoms as before, LED light 1 on, 2 flashing, front panel light flashing, no start. No any clue what to do else, just recovering the HD. G5Bye

Re: Apple iMac G5 2004 PSU gone

Thanks Toasty, your suggestion of a bad soldering work is correct. I've found that one of the last replaced cups had pins just about touching the metal shield behind. I think that happend when I moved the Mac on the table, just a question of microns. I dismounted again the MOB and saw the rest of a burning. This make sense, isn't it? Yes, the ipothesis of a short circuit keyboard is silly, now. A 220v PSU new from Apple service will be 60$ about here in Roma. All caps I bought were selected on Badcaps, following instructions, but I think that problem...

Re: Apple iMac G5 2004 PSU gone

Yes, PSU is bad smelling but no smears it seems. I've tried to replace the unit but the other one is also not working! It seems that those PSU die like flies. a stupid question which comes up to me is if there are sensible points which could be looked at first in case of not working PSU. From reading some mails I got the impression that that my question could be realy stupid. BTW let's ask. Thanks

Re: Apple iMac G5 2004 PSU gone

Sorry I forgot to add some techs about the PSU: DELTA model DPS180QB A rev 01, Apple PN 614-0329. Sergio

Ciao to all PSU stressed friends here. I've almost ZERO experience in repairing electronics but I decided to reweake an old iMac G5 1.8GHz bought on December 2004 after I saw blowed caps on the MB. I did replaced 20 caps and the iMac was just fine! But after two days I couldn't resist and cleaned the keybord with some detergent . Then, as I swicthed on the iMac, bad smeling and black screen. The PSU has no power except 5V, seems. LEDs on the MB behave like nr.1 is ON, nr.2 flashes (and 1 second light on the front panel), nr. 3 and 4 off. Do you think (maybe Toasty... ) I could...

Re: New Members - please post your introductions here

Ciao to all! Just signed in because I started to investigate why my iMac G5 2004 decided not to weak up a day... I am a poor biologist but using Macs since 1987 and I couldn't resist to try to weak up the big white box again. Then I saw the blowed caps inside the iMac and to buy and change the 20 capacitors inside was all at once. iMac was happy and started again BUT I decided that the keyboard was too dusty and short circuit that!!! Bad smalling from the powersupply, I guess, and no power at its pins except 5V at one point only....