Introducción
This guide will detail how to remove the Apple G5's main power supply.
Qué necesitas
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The cooling fan unit is located on the bottom right of the Apple G5 Desktop.
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Remove the G5 metal cover from the processing/cooling unit of the computer. NOTE: Apple inserted a rather fragile plastic pin that inserts through the top divider shield and clips into a tab on the hidden ledge of this CPU shield. Removing this pin, certainly voided Mac's warranty - but more appropriate for now, voids most after-market insurance plans. A replacement pin (new) is hard to get ahold of, and very few are talented and patient enough to remove this pin without damaging it. Just something to keep in mind. If you have no warranty any longer or don't care, please continue...
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Pull the metal plate to the left and outward to remove the plate from the processing/cooling unit.
The whole pin assembly acts like a miniature toggle bolt. The inner part of the pin assembly is actually a short stubby cylinder. When the pin is inserted into the sleeve, it presses on the sleeve and expands it slightly in the processor shield, locking it to the top divider shield.
I took a tiny drill bit and spun it into the center of the pin just enough so that I could insert a small sharp screw (I used a cup hook) into the pin. All it needed was just a slight tug, and the pin came out of the outer locking sleeve. I used the same screw to remove the outer sleeve.
I was able to push the bottom part of the shield to the left and unhook the bottom first. I then took a long wooden skewer (18" long) and pushed the center pin out. I then took a pair of needle nose pliers and gripped the two flared ends of the outer sleeve and squeezed them together and pushed the sleeve out of the hole. It was actually pretty easy this way and there was no damage to the pin or the sleeve.
Take a flat head screwdriver and lift a little on the top plate on the top of the cover so as to lift the plastic part slightly. Apply pressure near the top of the plastic keeper and separate it slightly from the metal. Take a box cutter blade and apply pressure around the outside not on the center of the pin. Once you can separate the pin a little from the outside edge take a long strand of glide dental floss and rope it around the pin inside the plastic holder and pull up. Do the same to the outer keeper piece and VOILA!
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Unplug the fan's power cable from the upper rightmost corner of the motherboard (connection J45). If there is a video card in place, carefully pull the cable plug down between the back edge of the video card and the motherboard. Note, the photo shows the unplugged cable and the area it plugs into outlined in yellow. No video card is shown in this photo.
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After the latches are out, pull the fan out.
Before pulling fan, you must unplug fan power cable from upper right-most corner of mother board (connection J45). Carefully pull cable down past the video card's back-side.
Thank you for this mention. It seems important, do you have a snapshot of it?
Is it hard to find/reach?
And plugging it back in with the new one, any problems?
Thanks!
Diana -
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Locate the Cooling Unit on the Apple G5.
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Put the CPU case on its back with the opening facing up to make the next steps easier.
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Unscrew 8 T10 screws from the cooling unit. NOTE: these screws are acctually allen keys. The prefered tool will be long handled allen keys. t10 are 2.74mm (closest allen key is 2.5 or 3mm) and t15 are 3.27mm(closest allen key is 3mm and 4mm). You may strip your tool or the actual screws themselves. Use a set of high quality long handled allen keys.
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The screws will loosen but will not come out, they are designed to loosen the unit, but remain in place.
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The last two images show another version of the LCS (out of the computer) in the G5 with off-center views to show the 8 screw holes.
Very difficult on some models.
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Pull the cooling/processing unit straight up to prevent damage to logic board
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The sleeves around the 6 screws may hold it in, if so just take a pair of needle nose pliers and gently squeeze the sleeves until it releases.
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Pull the bottom, then side towards the bottom of the CPU case, first to move around the bottom coolant sleeve around the heat sinking bracket. *heat sinking bracket not in picture*
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NOTE: Here are the standoffs without the cooling unit installed to make it easier to understand where the screws are located. Remove the bottom 2 standoffs so it is easier to remove the power supply.
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Check the pin connections for any damage. All the pins highlighted in yellow should appear straight up and not appear bent. DON'T TOUCH THE PINS. A bent pin will result in your computer not powering on.
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Locate the power supply in the Apple G5 computer. It is located under the metal plate at the bottom of the computer case.
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Remove the power supply cover.
You don't need to bend anything if you unscrew the lowest studs. The one with pozidrive head is an easy one, but the two round ones which hold the heat sink are quite a challenge. You need to put a nail into the hole which is perpendicular to the stud and turn everything left. You'll unscrew it and the shield comes out without any bending. Step #24 will be easier too.
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I Seem too Be stuck At Step # 25 my PSU HAS 9 L-SHAPED BRACKETS ATTACHED TO IT WHICH IS ALSO MOUNTED TO THE MOBO FROM UNDERNEATH....AND AFTER REMOVING ALL 9 T10 TORX SCREWS, WIRES AND CLIPS I STILL SEEM NOT TO HAVE ENOUGH CLEARANCE TO REMOVE THE PSU...... Apple Power Supply PowerMac G5 A1177 710W 614-0368 DPS-710BB---THIS IS THE PSU MODEL THAT I'M TRYING TOO REMOVE AND REPLACE....HAS ANYONE HAD THIS SITUATION AND FOUND A SOLUTION....ALLAN..6/25/16
i broke the connector on the sensor board for the plastic cover, which is glued to the metal body next to the right slot where the plastic cover goes in. the cable is routed around the right, behind the seal. make sure to disconnect this cable before you remove the psu!! now i need to solder the connector back on :(
To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Cal Poly, Team 5-8, Forte Winter 2010 Miembro de Cal Poly, Team 5-8, Forte Winter 2010
CPSU-FORTE-W10S5G8
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12 comentarios
I followed this guide to replace the PSU in my 2x2.0 PCI G5 - it now works great. I'd like to add that my machine didn't boot right away, I needed to reset the SMU on the main Logic board several times and I also re-seated the RAM chips which seemed to cajole the old beast back into life. I replaced a 450W PSU with a 600W and all seems well so far. Many thanks to the team for posting this ifixit guide.
these Apple support notes are worth a look if you run into problems restarting a machine:
http://support.apple.com/kb/HT2652?viewl...
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Finally - I would also like to add that this guide shows the CPU unit of what I think is one of the crazy liquid-cooled G5s that made a brief appearance in the Powermac range. The same steps still apply for the more common air-cooled models. The only difference being that my machine's CPU units were secured on their mountings with Allen-key type screws - not Torx screws. Doing this repair was not as difficult as you might think, I managed fine and I'm not a tech specialist.
The quad core G5 that I have in the UK requires the logic board to be removed before the power supply can be accessed.
That poor Mac!! All rusted.
All this is very interesting, however, if anyone has the voltage and pinouts for a G5 quad CPU (dual/dual core - 2.5Ghz) - LiteOn 1000W TESLAconverter PSU, I would be very, very, interested.
I love my power mac G5 but recently I encountered a problem with the power supply. It automatically shuts off after 10 mins. I called the service center here in the Phil but sad to say, the unit is already considered vintage. They no longer repair.
You should buy one from amazon and do the repair yourself, they’re like $50.
Calvin H -
