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psu
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2011 27inch Mac Restarting (Makes a popping sound)
I have a 2011 27inch mac that I had bootacamped with Windows 10 a while ago, everything ran smoothly till it started to make a pop sound then restart. I assumed that it would be the wire at fault so I changed that but still every once n a while it would make a pop. I decided to change sockets...- tharan2101
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- 2011 27" imac psu restart problem
- Replies: 3
- Forum: iMac
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dc voltage and current tolerance in the logic board of mini m2 pro
what is the dc voltage and current tolerance in the logic board of mini m2 pro? the psu output is 12.6v 14.7 A is ther built in voltage regulator? if so, what is the identification ID? -
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iMac G4 Power Supply "bridge booting" question
Hello all and thanks for having me! I’ve been lurking for a few weeks while I’ve been working on an iMac g4 M1 conversion mod. Big thanks to everyone who has contributed to this pool of knowledge - it is extraordinary! I hope this has not been asked before, I gave a good look but could not find...- WilliamRader
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- bridge clicking clicks imac g4 imac g4 mod mac mini m1 power supply psu whine whining
- Replies: 2
- Forum: PowerPC Macs
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I installed Leopard and now my computer shuts down by itself when I turn it on.
A few days ago, I used CCCloner to back up my 867MHz PowerBook G4 (aluminum version, not the TiBook) and make a full bootable copy of its hard drive. I copied to a 30gb USB and it took 8.5 hours :rolleyes: USB 1.1 is much worse than I remembered it, I'm used to 2.0 on my 2015 imac, and that...- PowerPCFan
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- cfcard dead mac failed hdd g5power pmg4 power mac powerbook g4 psu usb1.1
- Replies: 30
- Forum: PowerPC Macs
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MP 1,1-5,1 Mac Pro 3.0 A1186 does not turn on, makes clicking sound, LED 5 & 6 flash
Hi folks, first post, hope you can help me. Our Mac Pro 3.0 A1186 (early 2008, eight core) which was turned off for a while during Covid, now simply does not turn on anymore. When pressing the power button, it makes a clicking sound, then 3-4 seconds later another one, and simply nothing... -
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Dual 1.25 Powers On But Does Not Boot
I recently got a Dual 1.25 MDD off of eBay which describes as a restoration project. The system powers on but no chime. After about 10 seconds, the fans go full blast. I've done the following: - Replaced PRAM battery - Reset PMU - Reseat video card, RAM, and power supply connector to...- sethkj
- Thread
- fans high no chime powermac g4 mdd psu
- Replies: 5
- Forum: PowerPC Macs
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Mid 2011 21.5-inch PSU
I have a mid 2011 21.5-inch iMac that I’ve upgraded to 32GB DDR3 pc1333 memory, 512GB Samsung Pro 860 SSD, nVidia GTX 770m 3GB GPU from a Dell Alienware gaming laptop with A1312 three pipe GPU heat sink, and Intel Core i7-2600a quad core CPU. (Before people ask why didn’t I just buy a 27” with...- LegacyCore
- Thread
- 21.5 21.5 inch 27 inch imac psu
- Replies: 3
- Forum: iMac
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I think my PowerMac G4's PSU died, what should I replace it with in 2021?
Hello, this is my first post. I have used these forums for reference many times and some of the pages here are very helpful! I have a problem with a Digital Audio PowerMac G4 that I recently acquired. From other threads I've looked at it sounds like my power supply died. Symptoms and other...- BronzeLight
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- atx powermac g4 psu
- Replies: 20
- Forum: PowerPC Macs
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PSU style for Late-2015 iMac
I have a shorted 27" Late-2015 iMac, thanks to a duff USB dvd-drive, I'm seeking a replacement PSU. There are multiple 'styles' of 300W A1419 PSU from 2010-2015, which are similar at least in form factor, but I don't know if they're all compatible? Technically I think I have a MK462LL/A imac...- cliffdanger
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- psu
- Replies: 1
- Forum: iMac
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imac 2011 27" power supply problems
i have an imac 2011 27" , imac PSU was making the electrical buzzing noise. i replaced it with another PSU . now imac is silent but cpu fan is running at max rpm speed (4200). i checked HWMonitor temperatures and PSU temperature was 130 c , but PSU is not hot. please help me... where is...- mohammad.golche
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- buzzing imac noise power problem psu temperature
- Replies: 1
- Forum: iMac
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MP 1,1-5,1 Help diagnosing hardware issue
Hello. When I switched my Mac on this morning, it worked for a short while, then the screen displayed some small squiggly black lines all of a sudden. I could move the cursor for a few seconds after this, then everything crashed. I held the power button to power off and tried to switch back on... -
MP 1,1-5,1 MacPro 4,1 / 5,1 Adequate Wattage / Wiring: 980 Ti or 1080 Ti GPU
SOLVED via 'Pisla's Mod" It doesn't appear as difficult as it looked at first glance: It consists of using simple taps on 8 long wires, which are routed from the DVD area through the HDD shelf, to the GPU. I'll post any extra details or pictures after I do it ... as I'm sure I"ll find areas... -
Macbook died?
My 2017 Macbook died. I think. The screen glitched and then it went dark. No pulse. I've run into vid card and PSU issues on my Mac Pro and PC so I'm thinking it's probably one of those. I've never tried to replace parts on a laptop, and frankly, I would almost rather buy a new laptop. Thoughts? -
iMac not powering up after upgrade (RAM, SSD, CPU thermal transfer)
I did a few upgrades to a 2017 21.5" Retina iMac, and unfortunately, upon reassembly, it isn't powering on. Here's a photo of it, display disconnected. In the second photo I've labelled things for reference. Status: In the photo, AC is plugged in Of the 5 diagnostic lights, the first one... -
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MP 1,1-5,1 SOLVED: 2010 5,1 cMP won't boot. Backplane or PSU?
Sorry to make my first post one asking for help... I have a 2010 Mac Pro which won't boot and I suspect either the PSU or the Backplane has failed. The symptom is that adding a power cord and pressing the power button does nothing. No noise, no clicks, no lights: nothing. I have followed the...- quiet-cacophony
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- backplane issue psu
- Replies: 1
- Forum: Mac Pro
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17" iMac Won't Boot
iMac 17” 2 GHz A1208 does not boot, no chime, no fans or other mechanical activity. Opened it up to see the diagnostic LEDs. Upon plugging in, LED 1 lights up normally, and LED 2 lights up at about half brightness and before I touch the power button. I have not been able to find any... -
MP 1,1-5,1 What is safe PSU temps cmp5,1
Hay in the UK & we have a small heat wave, iv seen my PSU sensor 2 hit 67c+ at default settings. After that iv set the PSU fan to keep the PSU sensor 2 under 50c but at 1400-2000RPM it’s a real pain. 2000RPM and still 49c on PSU sensor 2 ! So is it safe to let it get that hot? Anything I can do... -
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MP 1,1-5,1 PowerSupply Question
Hello, My MacPro 5,1 power-supply is making a buzzing sound. I have already tried cleaning it out, but the sound still comes and goes. I'm thinking of buying another power supply to have a backup as I use my system for work. The model on my PSU is dps-980bb-2. While online I did see some units...- MrRedfield
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- powersupply psu
- Replies: 7
- Forum: Mac Pro
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MP 1,1-5,1 PSU & Fan Sounds on 2012 Mac Pro 5,1
Hi there, I wondered if someone could help to clarify if the sounds in the following video were normal or potentially a sign of something wrong (headphones recommended): https://bit.ly/2FJLMij The PSU is making a fizzing sound up close. The fan is also emitting a low whirring sound that is... -
MP 1,1-5,1 Is it time to give our cMP's PSU a recap?
I've read several reports of people having their PSUs dying, so I was wondering, since those Mac Pros are at least 10 years old, if it's finally time to get our hands dirty by opening the PSU, warming our soldering irons and give the thing some love with new shiny capacitors. Recapping is a...
