Power Mac G5 Fan Impossible to Unplug

SandboxGeneral

Moderator emeritus
Sep 8, 2010
26,270
9,573
Detroit
Best you can do is push the tab down and wiggle it from side to side until it pulls off. Is there room to use a jewelers screwdriver to pry them apart, gently of course.
 

MisterKeeks

macrumors 68000
Nov 15, 2012
1,832
25
I found that it helped to remove the cover of the uppermost PCI-X slot. This allows for easier access to the plug.
 

sunsetblow

macrumors regular
Original poster
Jul 6, 2013
163
23
Best you can do is push the tab down and wiggle it from side to side until it pulls off. Is there room to use a jewelers screwdriver to pry them apart, gently of course.
I tried wiggling a precision screwdriver where I kind of see tabs. My more important question is are there SUPPOSED to be tabs that I unlatch? Or should it actually come out quite easily?

I found that it helped to remove the cover of the uppermost PCI-X slot. This allows for easier access to the plug.
Good idea. I'll try that too. I can get a pretty firm grip on it already, though.
 

DeltaMac

macrumors G4
Jul 30, 2003
10,273
2,701
Delaware
From Apple's repair manual:
Press the cable connector up toward the media shelf when disconnecting the cable.
That should relieve pressure on the tab that is designed to keep that connector in place.
So - push UP on the connector (toward the hard drive rack), and while holding that pressure, tug on the cable. Should come apart then.
 

iamMacPerson

macrumors 68030
Jun 12, 2011
2,797
950
AZ/10.0.1.1
Usually what I do when these cables get stubborn is set it where the PCI cards normally go to give the cable more slack and pull. It might also be best, if you have a pair of needlenosed pliers, to pull directly on the plastic plug as much as you can.

Of course, make sure all PCI and AGP cards are removed.

May I ask what you are trying to do? Because sometimes the rear fan assembly doesn't need to be completely removed from the G5.
 

BJonson

macrumors 6502a
Aug 26, 2010
833
113
Be very careful here. I broke the bottom tab on the motherboard where the fan connects trying to get mine off. It actually had nothing to do with keeping the connector on. The connector pull straight off. Pull too hard and the connector might break off. I used a small screwdriver to pry it up, that helped it come off. I don't know why that connector is so difficult.
 

sunsetblow

macrumors regular
Original poster
Jul 6, 2013
163
23
Usually what I do when these cables get stubborn is set it where the PCI cards normally go to give the cable more slack and pull. It might also be best, if you have a pair of needlenosed pliers, to pull directly on the plastic plug as much as you can.

Of course, make sure all PCI and AGP cards are removed.

May I ask what you are trying to do? Because sometimes the rear fan assembly doesn't need to be completely removed from the G5.
I'm trying to replace the power source. I guess now that you mention it, I don't have to unplug it really, I can just unclip the fan from the case and put it on top or something, right?
 

iamMacPerson

macrumors 68030
Jun 12, 2011
2,797
950
AZ/10.0.1.1
I'm trying to replace the power source. I guess now that you mention it, I don't have to unplug it really, I can just unclip the fan from the case and put it on top or something, right?
Be careful, but yeah when I replaced the PSU in my G5, I just threw the fan assembly into the PCI card area.
 

sunsetblow

macrumors regular
Original poster
Jul 6, 2013
163
23
Okay, so I'm having more issues now.

I bought a giant T15 Torx screwdriver to get these damn screws out. The first one seems to have come out fine but the one on the bottom here just spins in the socket (loosely?) but it doesn't budge.

Any tips? I really appreciate all the help I've gotten so far (and apologies for dust... need to get to cleaning that out!)



 

iamMacPerson

macrumors 68030
Jun 12, 2011
2,797
950
AZ/10.0.1.1
Okay, so I'm having more issues now.

I bought a giant T15 Torx screwdriver to get these damn screws out. The first one seems to have come out fine but the one on the bottom here just spins in the socket (loosely?) but it doesn't budge.

Any tips? I really appreciate all the help I've gotten so far (and apologies for dust... need to get to cleaning that out!)
Looks like you got a dual core model from late 2005! Very nice!

According the service manual, you need a 4mm ballhead hex driver. I'm not exactly sure if a T15 screw driver would work, someone else would have to comment on that. Just make sure any instructions you look at are for the late 2005 models. The 2003, mid-2004, and early 2005s are identical, however the late 2004 and late 2005 were odd balls. Each need their own instructions for take apart because the insides are radically different compared to other models.
 

sunsetblow

macrumors regular
Original poster
Jul 6, 2013
163
23
All right! I'm asking for more help because I'm useless...

Thanks to the advice above, I'm following this service manual for the Late 2005 Power Mac.

http://tim.id.au/laptops/apple/powermac/powermac_g5_late2005.pdf

On page 129, it says to "lift up the bus bar tabs." I have no idea how to do that. They seem pretty fixed! I'm assuming this is the last step I need before moving the power supply since right now it's not budging an inch.

Any help is appreciated!
 

rjwbaker

macrumors newbie
Jul 28, 2014
24
0
Oslo
I replaced the PSU in my dual core g5 powermac lastweekend and also had problems disconnecting the fan plug, in the end i just didnt and instead rested the fan on the computer casing. It didnt get in the way.

Good luck

and by the way, replacing my psu didnt solve the problem, i mean the computer starts now but there is no chime and just a black screen, or to be more accurate it seams like the display doesnt get a signal.

Someone posted that the computer should chime with the graphics card uninstalled if that what the reason for the computer not chiming so i tried this..(removed the grapfics card and booted the computer) but still no chime.

Have you any suggestions?

kind regards Rob
 

sunsetblow

macrumors regular
Original poster
Jul 6, 2013
163
23
Hi everyone, so I've come to terms with the fact that I will have to gut the entire computer in order to remove the power supply and I'm simply not savvy enough to do this and don't have enough time to learn.

I want this to go to a good home. If anyone is interested, please PM me-- otherwise, other suggestions for getting rid of it are appreciated. Willing to entertain all reasonable offers!

This is the model we're looking at here: http://www.everymac.com/systems/apple/powermac_g5/specs/powermac_g5_dual_2.0.html

(I actually have the brand new power supply to install, so I'll throw that in too.)

Thanks!
 
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