MP 1,1-5,1 Good place to get new PSU for Mac Pro 5,1 2010 8-core

[skiltrip]

I need to get a new power supply for my 2010 Mac Pro 5,1 2.4Ghz 8-core.

Google search brings up a bunch of options, but I don't know how trustworthy some of these shops are. Can anyone recommend a solid source to get this power supply unit?

For those interested, here is why I need to replace it.

1.) After having been powered off, when pressing the power button, it seems like nothing happens, but it's trying to power on.

2.) Holding down the power button like you're forcing a shutdown, you hear it click and the power supply shuts off.

3.) Pressing the power button a 3rd time normally boots without issue.

This cycle works like this every time consistently. If I leave the computer on, it never shuts down. I've been using it like this for a few years now. I do worry that if I don't replace it now, I may NEED to replace it down the road and these parts might get even harder to get.

 

[startergo]

I normally buy them on ebay+squaretrade 1 year warranty (~15USD)

 

[christianboyce]

There's a flat little battery on the logic board. I would try replacing that. Even if that's not the problem it's such an inexpensive thing and when it dies completely you won't be able to start the machine at all, so having a new one in there prevents future problems. So for step 1 I'd replace the battery, and if that doesn't work I'd replace the power supply after that.

 

[DeepIn2U]

There's a flat little battery on the logic board. I would try replacing that. Even if that's not the problem it's such an inexpensive thing and when it dies completely you won't be able to start the machine at all, so having a new one in there prevents future problems. So for step 1 I'd replace the battery, and if that doesn't work I'd replace the power supply after that.

1.) After having been powered off, when pressing the power button, it seems like nothing happens, but it's trying to power on.

As mentioned above ... the CMOS chip should be the first thing to replace - removing external power chord for 30mins minimum and then this flat battery for 15mins. Also the most cheapest solution to symptom #1.

While your at it ... after replacing the CMOS battery use the keyboard shortcuts to clear the PRAM as well upon first boot up thereafter.

 

[MIKX]

skiitrip

1.
I would first shutdown - remove the PSU - thoroughly de-dust the PSU - replace the PSU = put the PSU back in the cMP
& ensure that the PSU power cable is correctly snap-connected in place


2.
Remove & then clean & de-dust everything - replace ( put back in )

3.
Remove ALL RAM except for one pair. Clean that RAM pair contacts with a clean, new eraser - blow clean with canned air


4.
Check ALL cables are correctly snap-connected.

5.
Remove ALL unnecessary PCIe cards eg: USB 3.0
( Note for future : If a USB 3.0 PCI card is installed and does have a SATA power socket - buy the cable and power it.)

6.
Attempt restart using the "THREE CONSECUTIVE NVRAM RE-SET".
= HOLD down these keys until the Happy Mac CHime is heard for the 3rd. time

HOLD DOWN : P + R+ Apple Command + Option keys. Until the 3rd. chime is heard.

=======================================

So many cmp owners automatically assume that the PSU is dysfunctional or a new motherboard is required or that the bootrom is corrupted etc.. Try the obvious first.

Old cMPs can develop weak power connections over time. All od the above steps have proved to be very useful for my 4,1>5,1 which is running strong, cool and 99% dustfree.