Power supply from g3 into a g4?

Hi ! i have a G4 533 which is kinda dead, and have a B&W G3 which is fine. i wanted to try to switch the power supplies, but i thought i'd ask here first to see if anyone knew if they were compatable. MOst of the number specs look the same, but not 100%.
thanks for any help!
j

The Digital Audio G4 and Gigabit Ethernet 22 pin Power supplies are interchangeable and have a nasty habit of dying which is why they are so expensive on the used market. No other Mac PSU will work in either model.
You can convert an ATX power supply to work but it's a little complicated. See this link:
http://forums.macrumors.com/showthread.php?t=261623

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I have been experiencing problems with my Dell XPS A2010 for a while now. Boots into Bios but will not Boot into Windows. Was told by a PC repair guy that it was the motherboard but not sure how he came to that conclusion. Ran Dell diagnostics and based on the error codes have come to the conclusion that it's the hard drive. I sell on eBay as a part time job in my spare time (am a stay at home mom) and am thinking of listing it considering I have since purchased a new PC. I was thinking of taking out the power supply and selling that separate from the system considering how much they go for but am hitting a dead end when it comes to my research on exactly how to do that and do it safely. That's how I found this forum. So, if anyone could provide any links or any knowledge, tips, etc on how to do that I would greatly appreciate it. Thanks!
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Here is the tear down on youtube.
Here is the Service Manual.

Power supply from iMac through FireWire

Dear all,
The user's manual of my iMac G5 writes: "The FireWire port is designed to provide power for FireWire devices (up to a total of 8 Watts)".
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Laszlo-
The only products that I know of that tap into that power supply are flash memory card readers and (physically) small hard drives. You do not need to do anything to "activate" the service-it is just available at all times on a couple of the pins on the six conductor firewire connector.
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I've got a G5 Imac with a blown PS, and I'm thinking of modifying a G4 Quicksilver power supply for use as the power source for a 20" Imac G5. Yeah, I know it sounds a bit weird, but hey, I was given this Imac G5 (1st Gen. 1.8GHz) for free. It's missing the back cover, and the PS is shot. So if I blow it up it no major loss. It's a project!
I have determined that the original PS is shot and needs to be replaced. I don't really want to drop $140 for a replacement PS, as I would also have purchase the back cover for another $40 + shipping. Go figure, right? It appears that most of those power suppies tend to fail early, anyway.
During my checks of the Imac internals, I also noted that during the "power on" tests, using the old power supply, I would get the second indicator light on the motherboard to flash for just a moment. According to Apple, this indicates that the motherboard is probably good, and that the power supply is bad as it's only providing a momentary voltage spike during the start up faze, before the power drains from the PS. Then it quits. So I thought, is it possible to use the QS power supply, only modifying (rewire) the main 22 pin connector voltages so they match the Imac's pinout? Both connectors are 22 pin and most of the pinout voltages match up the same. There would appear to be only two major connectors that would need to be rewired. So can I use a modified QS power supply to power my Imac?
A couple of extra notes about this Imac:
1) There is no back or stand with this Imac, it just the main guts. So I would need to build a suitable enclosure to maintain proper air flow, and use the QS power supply outside the Imac. That wouldn't appear to be a big problem.
2) My biggest concern is this. The QS power supply uses 28v for the start circuits, versus 24v for the G5 Imac PS. Would this make a significant difference, and if so, why? I'm assuming it will, but it an area I'm unsure of with the Imac. Any thoughts or experiance in this area here would be greatly appreciated.
3) Hey, if worse comes to worse, I can always purchase the extra parts and rebuild the Imac for around $200-$300 US, and it would still be a deal (at least I think so). However, at present this is just a pet project, and if it goes south (doesn't work), it's not like I'm out some major $$$$.
Thanks in advance!

I have no idea whether your ideas would work, but go to xlr8yourmac.com for some ideas. If you decide to purchase parts, try [http://www.synaptech.com/catalog> and also look at [http://www.jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php] for tips.
Let us know what you end up doing,

Power supply from a Dell

Hi Everyone
So i just ordered a W540 as my work PC too swap out my old Dell latitude.
My company is trasferring from Dell to lenovo setups in all the offices.
We move arround with our laptops so we have a lot of extra power supplys from Dell (19.5 V 3.34A with round plugs).
My question is, will we be able to use an adapter like this one (http://www.ebay.com/itm/2PCS-New-Power-converter-Cable-Adapter-For-Lenovo-ThinkPad-Carbon-0B47046-/3...) to power our laptops instead of buying loads of new power supplies?
Best Regards
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Solved!
Go to Solution.

kimdt27 wrote:
Hi Everyone
So i just ordered a W540 as my work PC too swap out my old Dell latitude.
My company is trasferring from Dell to lenovo setups in all the offices.
We move arround with our laptops so we have a lot of extra power supplys from Dell (19.5 V 3.34A with round plugs).
My question is, will we be able to use an adapter like this one (http://www.ebay.com/itm/2PCS-New-Power-converter-Cable-Adapter-For-Lenovo-ThinkPad-Carbon-0B47046-/3...) to power our laptops instead of buying loads of new power supplies?
Best Regards
Kim
No. That power supply will supply 65 W at the most, which is nowhere near the amount of power required for the W540. You could try to rig it to work on an X240, which takes about that much power, but a W540 requires a 170 W supply due to its power hungry CPU and GPU.
W540: i7-4700mq, K2100m, 8 GB DDR3L, 512 GB SSD
T510: i7-620m, NVS 3100m, 8 GB DDR3, 512 GB SSD

Power supply from CAN hardware PCI board

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Yes, this can be quite confusing. The internally/externally powered option refers to how the transceiver of the NI-CAN board is powered. When internal, the transceiver gets its power from the computer. When external, the transceiver gets its power from the V+ line of the CAN bus. Changing to external power will NOT bring any power to the V+ line.
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Can I use the power supply from a 1.83GHz CD mini with a new 2.53GHz mini?

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2008 iMac 8,1 still won't power up after replacing power supply

A few days ago my iMac powered-ON as usual at 8AM and was working normally, I checked email and left for a meeting. When I returned 30 minutes later my office had a slight odor of hot bakelite and the screen was dark, instead of displaying the screen saver. Thinking the power may have blinked, I pushed the start button on the back and nothing happened, tried several more times, then depressing and holding, still nothing - absolutely lifeless.
Presumed it was probably the power supply, so took it into the Genius Bar and my suspicion was confirmed; they checked the LEDs and advised that the power supply was mostly bad. Despite the hassle, the solution seemed simple enough: replace the power supply and I'd be back in business. That proved to be wrong!
Bought a new (NIB) power supply from a reputable dealer and carefully disassembled/reassembled the iMac feeling ever so confident that I'd hear the chime and fan whir when I depressed the ON/OFF Button. To my total disbelief nothing has changed! Its still dark and lifeless as before. Not discounting a theoretical chance that both power supplies could be bad I'm puzzled what to do next and where to look. Obviously, there isn't much in line ahead of the power supply, but given the fact there is no fan noise and no glimmer on the display, I can't fathom it could be anything other than something between the power cord and the power supply.
What could have caused the hot bakelite smell? The original power supply had NO bakelite odor and no burned chips, traces, scorched transformer windings or cooked capacitors. That had surprised me, so sniffed around the motherboard/backplane and detected a slight bakelite odor at or near the hard drive; I haven't cracked the case yet to examine the HDD - but, even if it were dead, I'd still hear the chime and fan, and maybe see at least a slight glow on the display, right?
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Thanks, much, compadres. AK

My assumption is the same as KT’s, the logic board fried. If the logic board is functional, even if the hard drive is dead, it should power on and perform the POST. Since it isn’t my advice is the same as KT’s - hope you don’t need Snow Leopard to run some older program(s).

Registering a 65w power supply? Where? How?

Just had not one but TWO G4 17'" powerbook power supplies go dead on me within the span of two weeks. The first one shorted out totally and left charred plastic and burn marks right where the cord the plugs into the computer meets the power brick. However the second literally caught fire in front of my eyes!
I was working on my laptop when suddenly everything shut down. I was confused at first but then I noticed the burning electric smell. When I glanced down at the power supply I saw blue sparks and tiny flames coming from where the cord meets the brick (computer side). I immediately unplugged my laptop first and then killed the power surge strip. The cord was totally burnt to a crisp. Gnarly...and good thing I was home when it happened!!!
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So I am using the one cord to power the two machines currently and I tried to register the darn thing in case this one decides to ignite but on the registration page I can't find any product listing for the power supply...or other apple peripherals for that matter. Its funny too because the Apple store staff made a huge deal of telling me to register the plug and I can't find a way to do it. I own many Apple products and they are all registered but it seems I am lost when registering something simple like a plug.
Can anyone out there help me or provide a link?
*I tried the normal registration link and there is no category for this product.
thanks!

yeah, I figured I would simply call AppleCare or take it back to the store and have them explain how to register online...since they said I could specifically register the power supply online.
also just to clarify things, the cords were not damaged but they were 3 years old. the litlle plastic flange nubs that are near where the cord from the laptop enters the brick were still intact. in fact, that is what MELTED and got all crispy and black. it seemed to me the problem was that the plug was somehow damaged INSIDE the plastic sleeve right where it entered the power brick.
I agree to never wrap the cord around the brick though. One thing that I must say to people who bought the G4 17" books when they first came out and are still using the same power supply, please take note of how hot the brick gets. Right before all this grief happened I started to notice that the brick was getting VERY warm (dare I say hot?) to the touch. I never once noticed any physical damage to the wires or connector...as far as I was concerned the power supplies were slightly less white but there were no visible signs that they were going to ignite.
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My advice: if your G4 powerbook power supply is too hot for you to hold it in your hand it may be time to take advantage of AppleCare and trade it in for a new one OR go to your nearest Apple Store and plunk down $90. Your choice!

QuickSilver G4 (M8360LL/A) Power Supply W/Dead Fan, Would Like To Discuss

Hey Everyone,
I recently discovered my Power Mac QuickSilver G4 (M8360LL/A -- http://support.apple.com/specs/powermac/PowerMac_G4Quicksilver.html) has a dead fan within the power supply. Running an open-case test shows all other fans are working fine. Currently I have a high RPM floor fan blowing A/C air directly into/against the rear of the chassis.
I've done some research on my options, but would like some help making the best choice:
(1) Purchase a replacement power supply.
(2) Install a replacement fan directly into the power supply since it still appears to be functioning normally.
(3) Purchase a cheaper alternative, but compatible power supply?
I'll discuss my research into each possibility in order:
(1) I've found a small number of sites selling replacement power supplies for the QuickSilver G4 systems (shipping not factored into the prices I'm listing):
(a) $174.00 from DV Warehouse (http://www.dvwarehouse.com/Power-Supply-344-W-PM-G4-Quick-Silver(733-800-867-933-1ghz/Dual)-p-20361.html)
(b) $179.99 from Mac-Resource (http://www.mac-resource.com/store.php?item=6612513.PART)
(c) $219.95 from WeLoveMacs (http://www.welovemacs.com/posu344wapog.html)
(d) At the time I searched, I didn't see anyone selling the same model power supply on eBay.
If I choose to purchase a replacement, I'll most likely go with the cheapest vendor since it's listing the part as new.
(2) I'm not confident enough to attempt a fan replacement, and since the power supply fan has been dead for an unknown length of time, I'm not entirely confident it hasn't been damaged from excessive heat. If anyone has a link or useful document that explains how to replace the power supply fan safely, I'd be open to the option. Right now, the most information I currently have is the physical specifications of the original fan (correct me if I'm wrong!):
Protechnic 80x80x25mm MAGIC (made by Sechang Micro)
12 Volt, 0.24 Amp
38.27 CFM, 3000 RPM (max), 29 dBA
P/N: MGA8012HS
I would probably want a better alternative if I went this route, since I didn't expect the fan to die quite this soon (although I generally run my system 24/x7).
(3) I found this other post where another G4 QuickSilver user had the same problem: http://discussions.apple.com/thread.jspa?messageID=2198292
That thread has a link to the following site with recommendation for purchasing power supplies:
http://www.Performance-PCs.com/
However, I've limited experience with voltage requirements and I don't know anything about the physical connector or dimensions of the power supply itself. At best, I know the model of my power supply is 614-0157 and can max out at 344 W.
If anyone has input and suggestions to help me fully explore my options, I'd really appreciate it. Otherwise I'll land on safe ground by buying an entire replacement of the same model, swap it out, and be done with it.
Power Mac G4 QuickSilver (M8360LL/A) Mac OS X (10.3.9) 2 GHz Processor Upgrade (Giga Designs), 1.5 GB RAM, 5 Internal HDDs

I decided to purchase a replacement power supply from DV Warehouse, since it was the cheapest vendor I could find selling the part as new.
When time permits, I intend to open the original power supply cover to see how challenging it would be to replace the fan. When I do, I'll add more about it to this thread.
One thing I'm noticing with this power supply fan while it's still in use with my system: If I push on a fan blade with a plastic stick while the system is powered up, I'll see the fan revolve a little (very slowly) before stopping. Not sure if that can be a useful clue as to which component within the power supply could have failed.
PB PM - About your earlier comment to blowing A/C air against the back of the case being more of a hinderance than helpful, is that true even when the component has no assisted airflow at all? In other words, my logic in using a floor fan to force colder air into the power supply is to help cool the components within it since there is otherwise only natural airflow to help keep the PS from overheating.
Thanks!

Power supply in s30

Hi there, quick question, i want to upgrade the lenovo s30 610w power supply with a corsair ax860 PS. Both power supplies are 24pin, with 8 pin cpu power connector, however the lenovo motherboard has an additional 4pin connection marked " 4pin power connector", will the corsair power supply work if I just connect the extra 4pin CPU power supply from the corsair into that slot? Any help is appreciated as always, thanks in advance.

Looking at the pics of the PSU on newegg, it's really hard for me to say if it has the connectors for it. The 4 pin (2x2) power connector on the S30 PSU provides 12V power to the board (mainly for bus powered PCIe devices). My guess is if that connector is not used, the system will simply try to draw all it's 12V power from the 24 pin connector. If your PSU can handle that, it might be OK. The problem I see with the system operating in that manner is that it's going to try to draw all +12V current through 2 wires. With the 2x2 connector installed, it balances that load across 4 wires. That 12V rail is spec'd to 16A in the Lenovo supply, so it's something to think about.
If you try it, I'd just make sure you can return it if things don't work out.
For reference, the 2x2 connector is pretty straightforward. The two pins closest to the latch feature are +12 (yellow), the other two are ground.

Power supply from g3 into a g4?

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