Hello Mayer, at last I received the Power Supply yesterday and I assembled it a minute ago. My iMac is back in service! for a few seconds I was afraid of pushing the button and not hearing the chime... but there it was. Thanks again for your help, and thanks also to the members and participants of the ifixt it site.

⟐ Commented April 20, 2017 at 8:58 MST

I wanted to bring this question back up because I'm working with Miro to do a tear down and repair manual on this machine. We don't have one. I still don't have an answer that I know for sure will work and wanted to bring it before the attention of possibly some other contributors. I've subscribed to the Apple thread on this problem with no results. Any ideas? Thanks.

⟐ Answer edited July 13, 2018 at 4:37 MST

⟐ Commented March 26, 2024 at 14:55 MST

⟐ Commented August 31, 2022 at 18:46 MST

I have an early 2009 24" iMac. It works well but it's starting to get old.

My question is if there is a chance to use it as an external monitor attaching a LCD controller to the screen.

My goal is to make a switch to use the iternal hard (core2duo) or use the imac as external monitor with a DVI plug on the back.

Thanks.

⟐ Commented January 31, 2026 at 14:59 MST

⟐ Commented December 27, 2020 at 3:12 MST

A few months ago I noticed my iMac acting strange, with my screen not refreshing and everything on the screen would have residual images. I did some searching on the apple boards, and others were saying it has to do with the fan not working properly and overheating. They recommended I used smcFanControl, which has done the trick so far. Is there a permanent fix to this? Something I can replace? Appreciate any info.

J.

⟐ Answered October 23, 2016 at 18:46 MST

my iMac doesn´t start right, as soon as i hit the power button there comes a Beep, 3 x short, 3 x long, 3 x short. As far as i know it should be something about the Ram or Ram Slot. Since i tried a few different Rams and nothing changed i suppose its actually the Bank/Slot itself.

What can i do?

⟐ Commented September 12, 2023 at 14:21 MST

I would like some insights about iMac's power supplies, especially the Early 2009 24" (A1225 EMC 2267).

I decided to tinker with an old broken iMac (machine that shuts itself down) to make it a Media Center with my Rasberry Pi and its Hifiberry + an LCD controller. But to do it right, I need to use the power supply for the screen (+ fan and why not also power the raspi).

But for that, I need two things:

The voltages (and current) of the output connectors which are obviously not standard (12 pins for the 12v-3.3v and 12 pins for the 24v that runs towards the inverter of the screen, although for the latter, I don't really care).

Know which pins to connect to activate the power supply (if I had this element, I could measure the voltages myself).

For now, I've spotted three things:

* Pin 1 = Ground

* Pin 2 = 12v always on

* Pin 4 = 3.3v always on

* Pin 6 = Ground

For the rest, I'm drying up, if you'd give me a hand, I'd be extremely grateful.

Hello,

I've made some progress in my tests, I've managed to activate the power supply!

It is sufficient to make a bridge between the ground (PIN 1,6,7,12) and the 3.3V (PIN 4), which activates pins 8, 9, 10

So we end up with these values:

On the 12V output (2x6 pins)

• Pin 1 = GND
• Pin 2 = 12VDC -> Always On
• Pin 3 = GND -> if SATA connected
• Pin 4 = 3.3VDC -> Always On -> PS_ON
• Pin 5 =?
• Pin 6 = GND
• Pin 7 = GND
• Pin 8 = 12VDC -> If On
• Pin 9 = 12VDC -> If On
• Pin 10 = 12VDC -> If On
• Pin 11 =?
• Pin 12 = GND

On the 24v output (1x12 pins)

• Pin 1 = 24VDC -> Always On
• Pin 2 = 24VDC -> Always On
• Pin 3 = 24VDC -> Always On
• Pin 4 = 24VDC -> Always On
• Pin 5 = 24VDC -> Always On
• Pin 6 = GND
• Pin 7 = GND
• Pin 8 = GND
• Pin 9 = GND
• Pin 10 = GND
• Pin 11 =?
• Pin 12 =?

A last connector is present on the power supply, it is a ground that seems to be dedicated to the 5V (it is connected to one of the SATA GNDs and to the motherboard).

We can see that this power supply only provides 12V and 24V, as surprising as it may seem, it is the motherboard that is in charge of transforming the 12V into 5V! (the cable between the power supply, the motherboard and the hard disk confirms it).

So I still have Pin 5 and 11 on the 12V port and Pin 11 and 12 on the 24V port which are a mystery (if someone has an idea, I'm a buyer)...

I found the electrical schematic of a Liteon PE324101UN-LF power supply (which also seems to be used in other iMacs), there seems to be some info, but I can only guess the usefulness of these pins....

On the 12V output (2x6 pins)

• Pin 1 >>- +12V
• Pin 2 >>- +12V
• Pin 3 >>- +12V
• Pin 4 >>- GND
• Pin 5 >>- GND
• Pin 6 >>- GND
• Pin 7 >>- +5VS
• Pin 8 >>- +5VS
• Pin 9 >>- +5VS
• Pin 10 <<<- AC_DET (Alternating Current Detection?)
• Pin 11 <<<- P_DIM (Power DIMming?)
• Pin 12 <<<- BL (LCD BackLight?)
• Pin 12 <<<- PS_ON (PowerSupply ON !)

On both 24v outputs (1x12 pins)

• Pin 1 >>- 24V
• Pin 2 >>- 24V
• Pin 3 >>- 24V
• Pin 4 >>- 24V
• Pin 5 >>- 24V
• Pin 6 >>- GND
• Pin 7 >>- GND
• Pin 8 >>- GND
• Pin 9 >>- GND
• Pin 10 >>- GND
• Pin 11 <<<- P_DIM (Power DIMMING?)
• Pin 12 <<<- BL_ON (BackLight ON?)

For AC_DET, I found this definition:

AC adapter voltage detection input. Valid AC adapter input range is set using resistors forming a voltage divider which are connected between ACDET & GND and ACDET & AC adapter.

P_DIM should reduce the output power of the 24V PINs to reduce the brightness of the display?

BL_ON, turn on the LCD?

In short, full of new questions.

Well, I finally succeeded in measuring everything I wanted.

I made a little schematic for those who would be interested.

If there's a mistake, don't hesitate to tell me.

oldturkey03> BL_ON needs to be powered in 5v to turn on the screen. For P_Dim, it's more complicated, I think it's about frequency, but the LCD converter will do it.

mayer>My power supply works very well, it is here a question of knowing what its specifications are to power a Raspberry Pi and other accessories without Apple motherboard! ;)

⟐ Answered December 15, 2024 at 10:17 MST

- Model: 24" iMac 8 (early 2008 model)

- Processor: 2.8 GHz Intel Core 2 Duo

- RAM: 4 GB 667 MHz DDR2 SDRAM (Two 2 GB Modules)

- Graphics Processor: ATI Radeon HD 2600 Pro 256 MB

- Hard Drive: 320 GB Hitachi HDT721032SLA380 (SATA)

My goal is to maximize my system as much as possible, because I use Music, Graphic Design, and Architecture software that requires a lot of RAM. I would like to get at least 8 GB of RAM (preferably 16 GB), a 2 TB HD, and if there is anyway to upgrade to a Core i7 processor or anything remotely close to it, I would like to do that as well. Please help me figure this out! Thanks!

⟐ Commented April 01, 2022 at 14:34 MST

⟐ Commented April 14, 2019 at 11:19 MST

It currently has 4 GB memory. I have read that unofficially it can be upgraded to 6 GB (4 GB + 2 GB). I just wish to know if I can upgrade to 8GB (4 GB + 4 GB).

I have already referred to the IFixit upgrade page. It just says that the maximum memory is 4GB. I just cannot recall where I read that it can be upgraded to 6GB. I am just wondering if it can go to 8 GB since it has 2 slots

But in iFixit it also says that "Although 8 GB will physically fit, the system will be unstable if 8 GB is installed." So should I upgrade to 6 GB only?

⟐ Answered February 23, 2020 at 3:40 MST

I'll need it because I have to replace my failed (stock) HD [hard disk] with a new, larger one.

Many kind regards, Dave.

⟐ Commented May 13, 2013 at 22:46 MST

I have everything you need (or so I think) to use my imac lcd panel (panel LM240WU2 ( SL) ( B4 ) ) as a monitor for other pc

http://i62.tinypic.com/112e876.jpg

http://i61.tinypic.com/2mwxct2.jpg

also I connect the cable from the inverter to the lcd

this http://i59.tinypic.com/f10dts.jpg to http://i57.tinypic.com/f2itxd.jpg

Connect the power cord from the iMac ( white ) energy to the panel. and I connect the power adapter to the board vga 12V 2A

but does not work , connect via a PC to give vga video signal and does not work

do I wrong ?

Help please :(

⟐ Answered April 02, 2026 at 23:00 MST

⟐ Commented May 11, 2024 at 21:54 MST

i am desperate for true help.

My iMac one day on boot presented a white screen with a folder with a question mark on it. After extensive test i four that probably is a HDD failure. I replaced the default Toshiba HDD with Seagate ST31000524AS 1TB, and i installed Lion on it. Everything was working great!...for 1 week. Let's cut into chase. Pathologic symptomatology started the day before yesterday (1st day), continued with quite a bit different form yesterday (2nd day) until today (3rd day).

1st day:

In the morning iMac used to freeze when i was working with him. Also there where times (few) with screen distortions and times (about 10, starting from yesterday) when the beach loading ball was appearing.

On the afternoon i found my iMacs screen freezed. Nothing was happening. I tried to restart, but with no luck. Startup hangs on the Apple logo with the loading circle there. I also did the following:

1. I did reset the PRAM. iMac booted 10 minutes and freezed immediately, i could operate it at all.

2. Three more times i tried to reboot it stuck on the Apple logo.

3. I pulled out the RAMS and chime does sound (check for logic board failure i found on Google, but i do believe it is a graphics or logic board issue).

4. I did boot from Verbose mode and there is an error message coming up write from the start when system is loading drivers saying "failed to load AppleUSBblablabla.kext (i don't quite remember more from the name cause iMac rebooted and i didn't memorize it).

5. Perhaps iMac is hotter than before.

6. I tried to see iMac from Macbook Pro via firewire but with no luck (firewire logo was flashing on the screen of iMac though).

2nd day: Morning

Today i went to an apple authorized technician.

I explained to him everything i tried. First thing he managed to do is to start the computer. White screen again..

Afterwards, he tried to start something like hardware test (edit: finally i learned that was the cooling diagnostics) but from the local network. It succeeded. 2 errors found: one red warning for the graphics card and one orange/ yellow for the HDD.

Last thing he did, he boot from an external hard drive. Black screen, appeared. Technician decided to do a hard reset, an when he pressed the power button, boom! The desktop appeared. Yeah, it is weird!

That moment i left the technician to do the rest. He telephoned me after 45 minutes. He proposed to replace the graphics card and afterwards the HDD. I explained to him that i dont think this is the best way to follow, cause ten days ago, as you read, i replaced the HDD already. So something else might be the problem that on second time triggers problems to the graphics card and to the HDD. He could not answer what is the cause of the these problems...

2nd day afternoon:

i managed to find apple service diagnostics and after many many unreasonable errors of disk utility i managed to put it on a usb.

I tried 2 times to run the EFI service diagnostics and i noticed that the iMac seemed to froze after 40 minutes, although the time was running. Then exactly i remembered the words of the technician. "probably it is the graphics card that cause the screen to froze, but the timer is running".

From my nature i am a perfectionist, and many times i believe that people dont give all of their efforts on resolving a problem of someone's else. So i decided to run the EFI one more time and just leave it...i went to play a bingo. I won 260 Euros. "the money for the replacement of the graphics card!..." i thought...

When i returned home after 2 hours the EFI test was almost complete!!! 2 errors found. Here are the pics:

http://cl.ly/3z2j0Z443R0j1B2O0i3s

and

http://cl.ly/0U0l3s0J0l1E2V3H0u3W

So the first one says:

a. Fan HDD test 2-Long Motor Test

System turns on motor and verifies that the motor is on.

ERROR - Motor did not reach target speed in time

TEST FAILED

b. Short random multi-block test test 1 - Full Read Test (DMA Full Read Scan at 1250)

- Reads the entire HD checking for slow - read failures.

ERROR - Reading took longer than the average time

- TEST FAILED -

What draw my attention was the fact that the EFI service diagnostics UI, is different from the one that technician run...then i think i remembered a post on the apple service diagnostics thread, which referred to the fan control something...i got really suspicious. I immediately wrote an email to the technician asking him if what he did is to run the fan control check program....

He replied...yes...

So i think that he just checked the fans of the system? And this fan check showed problems on the graphics card fan(!?)...i was there when this operation took place, but i didnt know what was going on. So if it truly was a test of all iMac's fans, then how he concluded that there is a problem with the graphics card?Hmm....

I want to add that i tried to put my macbook pro on FW mode in order to chose it as startup disc from the iMac. If the OS would load fine then it would be a HDD problem. Unfortunately, the system seemed to hang up, but i have to admit that i could leave it a little bit longer in order to see what will happen at the end. But, i then thought, if everything expect the HDD was fine, then the iMac should start normally...

2nd day: 3 hours later

i put now my macbook pro in fw mode and on the second attempt i managed to boot. login and see the whole system from my iMac. Currently i am writing from my iMac which sees the Macbook Pro via FW. No screen distortions, no nothing...

so, what does this experiment tells to us?

Furthermore i did succeed to boot from a USB running Lion installer. When i went to disc utility and selected the internal HDD of iMac this message appeared:

"This drive has a hardware problem that can't be repaired. Backup as much of the data as possible and replace the disk. See an authorized Apple dealer for more information". Also there was a "SMART status: failing"

http://cl.ly/1R2N121z1l0T0k1W0p0C

Could the HDD cause all the problems? It is a SEAGATE...maybe it is incompatible?

Here is an Apple error report from the first unsuccessful try to boot Lion from Macbook Pro on iMac via FW.

Interval Since Last Panic Report: 23 sec

Panics Since Last Report: 1

Anonymous UUID: 390B7874-EDE6-4E2A-B20E-EC75285BD7DC

Wed Aug 3 23:45:43 2011

panic(cpu 0 caller 0xffffff80002c268d): Kernel trap at 0xffffff7f80c746a6, type 14=page fault, registers:

CR0: 0x0000000080010033, CR2: 0x000000000000000c, CR3: 0x0000000000100000, CR4: 0x0000000000000660

RAX: 0x0000000000000000, RBX: 0x00000000000015cc, RCX: 0x0000000000000000, RDX: 0x0000000000000000

RSP: 0xffffff808010bdf0, RBP: 0xffffff808010bea0, RSI: 0x00000000ffffffff, RDI: 0x0000000000000000

R8: 0x0000000000000008, R9: 0x00000000fffffff8, R10: 0x0000000080808081, R11: 0x0000000000000000

R12: 0x0000000000000000, R13: 0x0000000000000000, R14: 0x000000000000000c, R15: 0xffffff80741b02cc

RFL: 0x0000000000010293, RIP: 0xffffff7f80c746a6, CS: 0x0000000000000008, SS: 0x0000000000000010

CR2: 0x000000000000000c, Error code: 0x0000000000000000, Faulting CPU: 0x0

Backtrace (CPU 0), Frame : Return Address

0xffffff808010bab0 : 0xffffff8000220702

0xffffff808010bb30 : 0xffffff80002c268d

0xffffff808010bcd0 : 0xffffff80002d7a3d

0xffffff808010bcf0 : 0xffffff7f80c746a6

0xffffff808010bea0 : 0xffffff7f80c765b7

0xffffff808010bef0 : 0xffffff8000639536

0xffffff808010bf30 : 0xffffff80006382b0

0xffffff808010bf70 : 0xffffff8000638154

0xffffff808010bfb0 : 0xffffff8000820057

Kernel Extensions in backtrace:

com.apple.iokit.IOGraphicsFamily(2.3)[897EB322-FD55-36D7-A68E-9E9C34A74A84]@0xffffff7f80c63000->0xffffff7f80c9afff

dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffffff7f8083e000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

11A511

Kernel version:

Darwin Kernel Version 11.0.0: Sat Jun 18 12:56:35 PDT 2011; root:xnu-1699.22.73~1/RELEASE_X86_64

Kernel UUID: 24CC17EB-30B0-3F6C-907F-1A9B2057AF78

System model name: iMac8,1 (Mac-F227BEC8)

System uptime in nanoseconds: 367855081214

last loaded kext at 137407698443: com.apple.driver.AppleHIDKeyboard 152.3 (addr 0xffffff7f81d16000, size 12288)

loaded kexts:

at.obdev.nke.LittleSnitch 2.4.0

com.apple.driver.AppleHWSensor 1.9.4d0

com.apple.iokit.IOAHCIBlockStorage 2.0.0

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleUpstreamUserClient 3.5.9

com.apple.driver.AppleMCCSControl 1.0.24

com.apple.GeForce 7.0.2

com.apple.driver.AppleTyMCEDriver 1.0.2d2

com.apple.driver.AirPortBrcm43224 500.36.11

com.apple.iokit.AppleYukon2 3.2.2b1

com.apple.driver.AppleHDA 2.1.1f11

com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0b2

com.apple.driver.AudioAUUC 1.59

com.apple.driver.AppleLPC 1.5.1

com.apple.driver.AppleMuxControl 3.0.8

com.apple.driver.AppleBacklight 170.1.9

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AudioIPCDriver 1.2.0

com.apple.driver.AppleIRController 309

com.apple.driver.AppleFireWireStorage 3.0.0

com.apple.driver.initioFWBridge 3.0.0

com.apple.driver.IOFireWireSerialBusProtocolSansPhysicalUnit 3.0.0

com.apple.driver.LSI_FW_500 3.0.0

com.apple.driver.Oxford_Semi 3.0.0

com.apple.driver.StorageLynx 3.0.0

com.apple.driver.iPodDriver 1.6.0

com.apple.iokit.SCSITaskUserClient 3.0.0

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 32

com.apple.driver.AppleUSBHub 4.4.0

com.apple.driver.AppleAHCIPort 2.1.8

com.apple.driver.AppleEFINVRAM 1.5.0

com.apple.driver.AppleIntelPIIXATA 2.5.1

com.apple.driver.AppleFWOHCI 4.8.6

com.apple.driver.AppleUSBEHCI 4.4.0

com.apple.driver.AppleUSBUHCI 4.4.0

com.apple.driver.AppleRTC 1.4

com.apple.driver.AppleHPET 1.6

com.apple.driver.AppleACPIButtons 1.4

com.apple.driver.AppleSMBIOS 1.7

com.apple.driver.AppleACPIEC 1.4

com.apple.driver.AppleAPIC 1.5

com.apple.driver.AppleIntelCPUPowerManagementClient 166.0.0

com.apple.nke.applicationfirewall 3.0.30

com.apple.security.quarantine 1

com.apple.driver.AppleIntelCPUPowerManagement 166.0.0

com.apple.driver.AppleHIDKeyboard 152.3

com.apple.driver.IOBluetoothHIDDriver 2.5f17

com.apple.kext.triggers 1.0

com.apple.nvidia.nv50hal 7.0.2

com.apple.NVDAResman 7.0.2

com.apple.iokit.IO80211Family 400.40

com.apple.driver.AppleHDAHardwareConfigDriver 2.1.1f11

com.apple.driver.DspFuncLib 2.1.1f11

com.apple.driver.AppleAVBAudio 1.0.0d11

com.apple.driver.IOPlatformPluginFamily 4.7.0b2

com.apple.driver.AppleSMBusPCI 1.0.10d0

com.apple.driver.AppleGraphicsControl 3.0.8

com.apple.driver.AppleBacklightExpert 1.0.3

com.apple.iokit.IONDRVSupport 2.3

com.apple.driver.AppleHDAController 2.1.1f11

com.apple.iokit.IOHDAFamily 2.1.1f11

com.apple.iokit.IOFireWireIP 2.2.3

com.apple.iokit.IOSurface 80.0

com.apple.iokit.IOGraphicsFamily 2.3

com.apple.iokit.IOBluetoothSerialManager 2.5f17

com.apple.iokit.IOSerialFamily 10.0.5

com.apple.iokit.IOAVBFamily 1.0.0d22

com.apple.iokit.IOEthernetAVBController 1.0.0d5

com.apple.driver.AppleSMC 3.1.1d2

com.apple.iokit.IOAudioFamily 1.8.3fc11

com.apple.kext.OSvKernDSPLib 1.3

com.apple.driver.XsanFilter 403

com.apple.driver.AppleFileSystemDriver 13

com.apple.driver.BroadcomUSBBluetoothHCIController 2.5f17

com.apple.driver.AppleUSBBluetoothHCIController 2.5f17

com.apple.iokit.IOBluetoothFamily 2.5f17

com.apple.iokit.IOUSBHIDDriver 4.4.0

com.apple.driver.AppleUSBMergeNub 4.4.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.0.0

com.apple.iokit.IOUSBMassStorageClass 3.0.0

com.apple.driver.AppleUSBComposite 3.9.0

com.apple.iokit.IOFireWireSerialBusProtocolTransport 2.1.0

com.apple.iokit.IOSCSIReducedBlockCommandsDevice 3.0.0

com.apple.iokit.IOFireWireSBP2 4.2.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.0.0

com.apple.iokit.IOBDStorageFamily 1.6

com.apple.iokit.IODVDStorageFamily 1.6

com.apple.iokit.IOCDStorageFamily 1.7

com.apple.iokit.IONetworkingFamily 2.0

com.apple.iokit.IOATAPIProtocolTransport 3.0.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.0.0

com.apple.iokit.IOAHCIFamily 2.0.6

com.apple.iokit.IOUSBUserClient 4.4.0

com.apple.iokit.IOATAFamily 2.5.1

com.apple.iokit.IOFireWireFamily 4.4.3

com.apple.iokit.IOUSBFamily 4.4.0

com.apple.driver.AppleEFIRuntime 1.5.0

com.apple.iokit.IOHIDFamily 1.7.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 165

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.DiskImages 326

com.apple.iokit.IOStorageFamily 1.7

com.apple.driver.AppleKeyStore 28.18

com.apple.driver.AppleACPIPlatform 1.4

com.apple.iokit.IOPCIFamily 2.6.5

com.apple.iokit.IOACPIFamily 1.4

Model: iMac8,1, BootROM IM81.00C1.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.30f1

Graphics: NVIDIA GeForce 8800 GS, NVIDIA GeForce 8800 GS, PCIe, 512 MB

Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 800 MHz, 0x2C00000000000000, 0x3136485446323536363448592D3830304531

Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 800 MHz, 0x2C00000000000000, 0x3136485446323536363448592D3830304531

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.11)

Bluetooth: Version 2.5.0f17, 2 service, 19 devices, 1 incoming serial ports

Serial ATA Device: ST31000524AS, 1 TB

Parallel ATA Device: OPTIARC DVD RW AD-5630A

USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 3

USB Device: Cruzer Edge, 0x0781 (SanDisk Corporation), 0x556b, 0xfd100000 / 2

USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000 / 2

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 3

USB Device: Microsoft 5-Button Mouse with IntelliEye(TM), 0x045e (Microsoft Corporation), 0x0039, 0x3a200000 / 2

USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2

FireWire Device: fw_target_disk_mode, AAPL, 800mbit_speed

as you see...is there an error with com.apple.iokit.IOGraphicsFamily

3rd day (today):

I run istat menu pro 3. The results are the following:

http://cl.ly/1h3i3S2W3p250J3b191V

They seem normal to me after cross checking them with my cousin's iMac which is the same model as mine. I don't know what the 0s mean, but i rely on you guys!

I finally managed to run Hardware Test from the Leopard DVDs that came with my iMac.

http://cl.ly/222Y2a2e361e0D0p2f3c

Another vote for HDD failure i suppose...

I dont know why, but after the EFI srvice diagnostics, iMac is "stronger" and somehow better.

I run techtool pro 6 which said that the same thing as the disc utility: the HDD needs replacement.

I run then data rescue 3, same message: the HDD is dead.

Did anybody see the pics above? From the EFI service diagnostics emerge 2 errors. I think that one of them comes from HDD2 fan.

So...do,i have a combined problem? Graphics card and HDD.

About the graphics card: when i boot lion that sleeps insid macbook pro from iMac, i cannot see something that rings bells for a graphics card problem...maybe something inside causes the system to overheat?...i dont know...

Currently i am on my iMac using my Macbook Pro as start disc via Firewire. There is not something that make me say: i have a graphics card problem! Maybe the iMac gets too hot and caused the HDD to die and graphics card to slow down?

And moreover i dont know what to fix first...ideas?

Please help!

⟐ Answer accepted November 15, 2013 at 20:50 MST

⟐ Answer accepted January 16, 2010 at 2:51 MST

I just removed my old HDD, just to install an SDD in the HDD slot, and an HDD (1TB SATA on SATA-to-IDE-cart) in my Optical Slot.

Everything seems to have gone smoothly, except... For seemingly no reason, my CPU fan goes to 3500 (CPU at 30-60°C), and my HDD fan to 1300 (HDD at 50°C). I think, at least the CPU fan shouldn't do so...

I already tried resetting the SMC, and reopened it to look if I maybe removed or forgot to reattach a temperature sensor, but both did not bring any solution at all.

Any Ideas?

Thank you!

⟐ Commented March 24, 2018 at 3:06 MST

can i change my Graphic Card to ATI RADEON HD 4850 GDDR3?

⟐ Commented April 08, 2020 at 12:54 MST

When I plug the iMac in, the left diagnostic LED (#1) on the logic board lights.

When I press the power button, LEDs 2 & 3 light, the optical drive makes a clicking sound, and that's it.

The fans do not spin, the hard drive does not spin, the Mac startup sound is not heard, the display does not light up.

I've tried the following with no change:

-Resetting the SMC

-Attaching an external monitor

-Reseating the RAM

-Replacing the RAM with other known good RAM

-Booting with video card removed

-Sent the logic board and video card to Powerbook Medic for repair, they said they did a reflow of the logic board pins at the video card interface, and the video chip on the video card was re-balled and reflowed.

-Powerbook Medic also claimed the power supply was fine, but I don't know that they actually tested it.

None of these things have made any difference and I'm running out of ideas.

Any suggestions?

⟐ Answered June 14, 2015 at 7:40 MST