IMac :: Finding 20in Aluminum (late 2007) LED Diagnostic?
Aug 19, 2010
I recently bought an used iMac (was purchased new in feburary 2009) in which I knew the screen was not showing any video when I bought it. ( I was okay with that I thought I'd give it a go at fixing) well the problem seems to be within the LCD itself. When I hit the power button I hear the chime, fan spins, and the hard drive does it's thing. I ended up taking the casing off the iMac to where it only shows the bottom half of the insides underneath the LCD. My question is now to diagnose what exactly is wrong with it by using the 4 led lights. I have searched the forums and the Internet up and down for which ones mean what but I have only found out information on older iMacs. When my iMac is off (still plugged in) LED 1 is on. When I turn the iMac on LED 1,2, and 3 are green. Which that leaves the 4th LED not being lit up at all. I suspect this has something to do with the iMac not showing any video but as I said I am not sure because I cannot find any information on it anywhere.
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Apr 29, 2010
I have taken some measurements from my PSU and since I have not seen this sort of info posted anywhere else and it is not in the service manual I thought I'd share it here.
refer attached
Note ** The voltage on pin 4 varies according to the temperature of the PSU and ranges between 1.7V and 2.5V - Higher voltage = lower temperature.
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Jan 31, 2009
I have an aluminum Intel (2007) iMac and I have had it for two years now. I love my Mac and would never go back to a PC now, BUT (you knew that was coming) I have recently (unfortunately I don't know exactly when) developed a problem in that my iMac will not auto sleep. The screensaver will kick in OK, but it will not go to sleep on its own. I can put it to sleep from the menu manually, but not by the setting in System Preferences. I have reset the PRAM, and the SMC and neither of those changes have worked. Have any of you had this issue and solved it?
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Sep 8, 2009
I bought my aluminum imac when it was released in late 2007. I had a 1 gigabyte stick up until now, but I decided to upgrade to 2x2 gigabyte sticks. When I took out the 1 stick and placed the new ones in, my computer would sound like it turned on, but the system really did not boot up. I have tried many configurations to see what the problem with the RAM is, and all I could figure out is that the computer will only boot up if the original 1 gig stick is in one slot. I checked both sticks with this, and they seem to register on my mac when I check the "About This Mac" section. Basically, I get a black screen if I use only a 2 gig stick, or both 2 gig sticks. I can have a maximum of 3 gigs so far, but I really would like all 4 that I paid for. I'm not so sure that it's a problem with the ram, especially because it is recognized by the system, but it can't boot up the system, so I am simply dumbfounded. Anyone have an idea what the problem is? I just recently installed Snow Leopard prior to getting the RAM if that has any importance.
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Mar 30, 2009
Is 1920 by 1200 the max the late 2007 iMac can support on a Dell 3008wfp? In which case, will that look okay?
What would I need to do to get the max res out of this?
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Sep 15, 2009
Ever since I installed to 10.6.1, I have been having issues with WiFi.
I'm only getting 3 bars, and my iMac is sitting less then a foot away from my AEBS, on 10.6 I was getting 4, also I've been dropping my WiFi connection every hour or so, and I have to turn AirPort in on my iMac off and turn AirPort back on.
This is really annoying and I don't know what to do, anyone have any ideas?
I've already reset my AEBS twice and that hasn't worked.
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Jul 29, 2009
As I mentioned in a previous thread, I'm selling my iMac to buy a MacBook. The MacBook (2008 uMB) has arrived, with all the discs etc, which is brilliant.
My iMac however, came preloaded with Tiger, with a Leopard upgrade disc in the box. This Leopard disc has disappeared off the face of the planet, and so Apple are shipping one out to me, not sure when it will arrive. In the meantime, my auction ends tomorrow, so would it be possible to restore the iMac using the Leopard discs that have come with the MacBook, or is it safer to reinstall Tiger, and wait for the Leopard disc to arrive before shipping?
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Apr 1, 2012
My iMac stopped booting. The fans and hard-drive spin up but the screen stays black and I can hear that the hard drive isn't been read after the initial spin up.
I decided to open it up to take a look at the diagnostic LEDs to see if it might help me diagnose the problem (the most obvious failure is the logic board). I can't find the LEDs anywhere, where are they? Does my iMac even have diagnostic LEDs?
The other possibility is that I can't find the lights because they aren't lighting up. The fans, the hard drive and the CD drive all spin up fine so at least I know that there is some power running though it.
Info:
iMac, Mac OS X (10.6.8), 27" 3.06GhZ (late 2009)
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Feb 8, 2010
My friend has a 20 inch iMac (model MB324LL/A) and he has bought 2x4GB SO-DIMMS from cosair. He has put them in and the mac wont recognise them, however it will recognise and boot up with 6GB (using 1 old chip and 1 new one) and he has tried swapping the chips about to make sure one is not faulty.
According to cruicial and Apple the max supported is 4GB but if it runs on 6GB can he get it to work on 8GB somehow?
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Oct 10, 2010
I have a 20 inch imac that I bought about 2 years ago. The processor is a 2.4 GHz intel core 2 duo. and the memory is 1 GB 800 MHz DDR2 SDRAM. I am wanting to try and sell this and buy new 13" macbook pro, the 2.4GHz model with 4 GB Ram. I want to get this now because I do alot of video editing for action sports using Final Cut Pro, now getting into Adobe Premiere, but I am driving alot and would like to have a MBP to bring with me now. I want to know though, how much of a performance difference would I see using this for Final Cut Pro and Adobe Premiere?
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Sep 30, 2010
I'm very happy with my 2010 MBP 15" i7 -- very slick little piece of kit!
However, there have been a few cases recently where I had to force a hard-shutdown of the laptop (holding the power button for 3 seconds). This is not because of the actual MBP per se, but because of some software that froze and wouldn't let me force-quit them.
Anyways, I'm wondering, since I had to hard-shutdown several times recently, if I should check my OS for any weird happenings? I always, always do Apple > Shutdown, but I've been forced to use the power button recently.
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Nov 2, 2010
I am about to upgrade my late 2008 aluminum MacBook 2.4 Ghz to 6GB of ram from owc but wanted to know if the will support 8GB, running at full stability. From what I can tell from other threads is that the owc 8GB kit doesn't work is this correct? If it can handle 8GB of ram I will do that instead of 6GB.
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Jun 10, 2008
I have a late 2007 Mac Pro 8 core 3.0ghx, system with 16 gigs of Ram. Two hd, one with OSX 10.5.2 and one with Vista Ultimate x64. I have a mac mouse and keyboard.
I have unpredictable, spontanious reboots. This happen on either OS's. I DO NOT have "reboot on power failure" check marked in the power savings menu. Once this cycle starts it gets worse, until the system just loops non stop at the beginning of the boot sequence, just a clicking can be heard. I have to power button off and unplug to stop it. Then when it reboots it sometimes happens again and other times not. Sometimes I may be moving the mouse or clicking then it just reboots. Or I might try to start a program, and it reboots.
I took it to the 'Genious Bar', this guy told me to make sure its grounded propery on the outlet, that it must be a three prong outlet with a properly connected ground. And to uncheck "reboot on power failure" Which i told him it was not checked. Of course it did not reboot or show any signs of a problem while I was there. I came home and moved the computer to a new outlet. It ran fine (as it did in the store) for about a week, then the problem came back. I had not changed anything.
I ran a harware test and everything came back fine, so no problem with bad RAM etc. Is it possible to have a bad power supply, would this be a symptom? Or possibly a bad power cord? And why would my computer reboot instead of power off, if I have unchecked "reboot on power failure" ?!?
Anyone experiencing anything like this? Any ideas, things to try? The computer is unusable at this point and has rebooted while using programs, that the programs will not longer start and have to be reinstalled.
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Apr 25, 2009
I've tried installing Boot Camp from my Leopard DVD (Win 7 didn't like either of my Mac Pro's discs), installing the Boot Camp 2.1 update, and removing all audio devices and forcing Windows to search for new drivers.
Anyone know what's going on? I was previously running Vista, but I heard games run better under Windows 7, and it was time to wipe the drive fresh anyway, so I thought I'd give it a shot. Any help so I don't have to roll back to Vista would be much appreciated.
Update: This is even stranger. Turns out audio *is* working, but it is incredibly faint. I'm cranking volume up on my external speakers far beyond anything I would regularly listen to, and I can barely hear streaming music from sites like Lala or Last.fm. I checked the volume mixer and all my levels are up at 100, it's like there is some kind of extremely low audio level limit being enforced before it gets out to the hardware.
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Jan 22, 2010
I'm planning on doing a clean install on my late 2007 MacBook. I used this MB until I got my new MBP, so it already has SL on it (from when I upgraded to SL). I am giving the MB to my mother, so I want to set it up as a new computer for her. I want the OS to be completely fresh, as if the MB has never been used before.
Obviously, I will not need to transfer over any files/docs/music/etc. I just want the MB to be loaded with what a MB typically has on it out-of-the-box.
The MB came with Leopard (10.5) System Install Discs (obviously), which I still have.
I will be doing the clean install from the $29 Snow Leopard Upgrade disc that I bought.
From what I understand, the SL clean install should go like this:Insert SL disc and reboot MB
Select language and continue
Select Disk Utility, select disk, and select Erase Disk
Close Disk Utility
Back in the SL Install window, select 'Install'
Wait for SL to be installed (approx. 45 minutes)
Are those the correct steps?
My main question is this: Once I finish the clean install of Snow Leopard, will all of the standard Apple applications be there? I'm talking about iLife and anything else that typically comes with a Mac. Or, will I have to insert the System Install Discs that came with the MB and install iLife from there?
Alternatively, should I do the fresh install using the Install Discs that the MB came with, and then upgrade to SL?
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Jul 22, 2009
Recently my battery health has dropped to 21% with only 79 cycles. I have tried calibrating the battery and have always done it at least once a month. Just this morning I was running on battery power and it shut off with 65% of charge left. I'm off to college in a month and am wondering if Apple will replace my battery even though I'm not under warranty.
I would take it to an Apple Store but unfortunately the closest one is an hour and a half drive away. Should I try calling Apple?
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Aug 29, 2009
I thought I'd post my early findings. I have a late 2007 Santa Rosa MB in white, 4GB and 2.2 Core 2. Mine came with Leopard and still included the remote.
Anyway, I was a bit leery about SL, because this is a little older, but I did a in place upgrade, it took about 45 minutes.
I must say, things feel quite a bit snappier, even the graphics around the dock and windows. It boots up a little faster and seems to shut down pretty fast.
I've heard mixed things about things being slower for some people, but I can say this feels nicer. I'm still poking around to see what else has changed.
One thing of note, my Brother MFP's little control center app was removed in the process but the driver is still there. So I need to find how out how I am going to scan and stuff over the network.
Overall I am very happy with the upgrade, I'm just glad it's not slower.....
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Jan 18, 2010
I tried installing Snow Leopard on my Late 2007 MBP with the installation disk I got with my 2009 MBP but I figured out that it wouldn't work because the installation disc would only work on the new machine not the old one. Anyway, now when I boot, I get the usual installation guide but the disk won't eject. I went to Disk Utility-->Eject Disk but it gave me a warning message that it couldn't be ejected because some applications were being used. I have no idea what that means and why it wouldn't eject the disc!
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May 2, 2010
My macbook (Late 2007, Intel GMAX3100 graphics, Snow Leopard) has been causing serious graphics glitches the last couple months. It has been happening for quite a while now, and for the last month it has happened every time i boot the machine up.I have also had problems on windows 7 through bootcamp where the graphics card would bluescreen windows, which leads me to believe my graphics card is dying.
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Aug 5, 2010
I've been following many threads on Mac Rumors for a while and thought I finally post something (hopefully) useful for others and in hopes that I can get a meaningful answer. So please don't flame me if this may be a newbie question... here I go:
So I have a MacBook Pro 2.2 Ghz Late 2007 computer, equipped with a 500GB WD Scorpio Blue HD and 4Gb of RAM. What I do with this computer primarily is graphic design and editing (Photoshop, Illustrator, InDesign, Final Cut Pro, etc...) and some amature music production (Reason, Garageband, Djay...)
I've followed the 6gb/8gb RAM upgrade forum for a long while for Mac products and finally bought myself a 6GB upgrade kit from Other World Computing. My package arrived today, and I hate to admit but I'm afraid to upgrade the RAM because of the slight hit/miss ratio I heard about using it. It's usually a good thing to upgrade to something higher I know, but I read that even if I did upgrade, I would only be using about 3GB worth of memory on it and not the full 6GB. Plus, I would lose the dual channel architecture doing this... if that did make a big difference to my heavy use of RAM.
Just today I learned about ExpressCard SSD's and how they can act like a separate HD in themselves. I'm highly interested in a very economical 64GB ExpressCard I researched. They're super fast and sound like a better alternative to RAM upgrading, especially if I can only use a max of approx. 3GB of RAM on my model computer.
So after all of my gibbering and jabber, here's the question:
From your experienced perspective, what's a better option for me to take...
1) Use the 6GB RAM upgrade?
2) Buy an ExpressCard SSD and use memory intensive programs on that?
3) Use the 6GB RAM and buy the ExpressCard SSD together?
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Apr 4, 2012
I Have a late 2007 (nov) mac book and was wondering what the best type of RAM ungrade would be for my labtop. I believe I read I can put a 4 GB upgrade in.
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Nov 13, 2010
Will be upgrading the RAM and HD. I know apple sells various hardware upgrades but I guess I'm hardly limited to what they sell.
Q:
-The FSB is @ 800Mhz so I assume I can get RAM at that speed?
-Can install better HDD than the ones origionally offered?
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Jun 7, 2008
I have a 40" Samsung LCD HDTV - 1080p. I am aware that the Macbook is not made to output to such a large, high res display. However, when I use the mini-DVI to VGA adapter and, obviously, a VGA cable into my tv I get some weird results. (I have tried using DVI-HDMI but I have nonstop compatibility issues with the tv, so thats out of the question, VGA works fine and is good enough quality for me) When using the tv as a second monitor, it works without fault, as long as my Macbook is open and awake.
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Jun 12, 2009
I took my Late 2007 Macbook to the Apple Store to have the screen checked out (there were random burn marks on the screen). They sent it out for repair and when I got it back I noticed the screen was awesomely bright!
Is there anyway to see if they used an LED backlight screen as the replacement? System profiler didn't tell me much.
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Dec 21, 2009
I have a MBP Santa Rosa, 2.2 gHz 120 gb HDD and I want to install Snow Leopard on it but when attempting to install it, it gives me a message saying that Snow Leopard couldn't be installed on the machine.
Why is this?
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May 17, 2010
I am hoping someone can offer some advice/help on a fresh issue happening with my Macbook (late 2007; OS 10.5.8; 2.2Ghz Intel Core 2 Duo; 1GB memory).ll darkened/shaded areas on my display are lined in little red pixelations. It's especially bad in colored screen images/photos and the worst in videos (ie Youtube).I noticed the issue about 3 days ago (5/14), and attempted to do some different software updates. Nothing. I'm really lost. The tech guy at work (not a mac guy) said it could either be a video card problem or the display is failing. I know very little about these things, but I do know the computer is out of warranty.
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May 19, 2010
I'm wondering if I will see much speed gains going from my late 2007 macbook with a 2.2Ghz core 2 duo processor(santa rosa?) to the new 13" macbook pro with the 2.4 GHz core 2 duo. I couldn't find a consistent set of benchmarks between the two computers.
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May 8, 2012
I upgraded the RAM in my Macbook (late 2007) and the computer won't boot. I have power but no video display. I put the old RAM back in and it worked fine. I was careful to order the correct RAM: DDR2 PC2-5300 667 MHz. Is it possible the memory is bad?
Info:
MacBook
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May 14, 2012
My MacBook (2007, late mid-year model) is overheating and the batter cover has buckled. Now the battery does not seem to want to charge. Do I need to replace the battery? The computer? What will help? I'd like to use the computer for as long as possible, though I realize I am probably overdue to replace it. It is my only computer at the moment.
Info:
MacBook 13 inch, 2007, Mac OS X (10.5.8)
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Nov 28, 2009
I'm using a MacBook, the late 2008 aluminum edition. I'm running Snow Leopard and have updated to 10.6.2. For the last few weeks, I've been having a problem where my computer switches in and out of Expose view (where you can see all the windows open at once) and normal view, even when I haven't touched the trackpad or pressed F3 on the keyboard. Sometimes it switches back and forth very rapidly, other times, it just switches into Expose, and then I have to click back out of it, and as soon as I do, it enters Expose mode again. I don't have any hot corners enabled, and the problem occurs even when I turn off 4 finger swiping on the track pad. I can't find any information about this problem anywhere, and I don't know what could be causing it or what I can try to fix it
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