Old Topic, looking for newer answers....iMac (Late 08 model) shuts off

Hi all, I've posted this topic before but became really busy and was unable to troubleshoot this problem to the fullest. Long and short is that my iMac decides to shut off on it's own. I've ran the hardware test months ago with the code saying that the temperature control was messed up. I've since taken my iMac to an Apple service center where they have changed the display and the power source and I'm still having problems. I've surpassed the Apple warranty and was dumb enough to not get the AppleCare for this system.
A little more details, temperatures of core components (the ones that iStat Pro would show) seem to be normal. Nothing is over 120 F yet my CPU fan is spinning at nearly 4k rpm. For whatever reason, when this fan kicks in, the computer likes to shut off, even if temps aren't that high. Has anyone else experienced this? I know I'm going to either have get a new computer or face the bill for repair, but any help would be greatly appreciated.
Lastly, I've tried running the Hardware test before posting this and the dang test won't launch. I'm losing too much hair people, please help!

Ok, figured out the hardware code, it is: 4SNS/1/40000000: TpOP-131.000. Any takers?

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IMac Late 2006 shutting off

My iMac Late 2006 started randomly shutting off about a couple months ago. It would normally turn right back on and work fine. Now I cannot get it to turn on at all. I've tried many different power outlets, and I tried resetting all the power stuff with no results. On a rare occasion, it will turn on after pressing the power button over a hundred times. The Apple Store told me the iMac is vintage and they cannot fix it.
I want to know what the issue could be. Apple said it might be either the power supply or the logic board. Has anyone else experienced this? If its the power supply then I will go ahead and fix it but fixing the logic board won't be worth it.
What should I do?

Given the vintage of your machine, the problem could be anything.
Power supply issues have a specific profile. Your machine suddenly turns off. You reboot, and it works a while, but lasts a shorter amount of time. Reboot it, and the time will decrease. In this case, the only option is to get the power supply replaced.
Logic board has a wide variety of symptoms, depending on the model of your computer. Your issue is not inconsistent with logic board problems.
As RRFS counsels, getting a new computer will be more cost-effective than repairing the old one. Be sure to back your data regularly, of course.

Can't boot up but looking for new answers

I've looked on this forum back about three months but can't quite pin down the problem. I've got a MacBook from early 2008. We just bought it from a third party, and he had installed OS X v10.6. He did not include the original start-up disk(s) or any documentation (or the power cord, for that matter). Initially my husband booted it up, which took 17 minutes. He then shut it down to wait for me to arrive home. When I booted it up the next day, all I got was a white screen and the folder with question mark. I got my hands on a 10.5 disk and have been using that in various ways (C and D on start-up) and after several minutes the disk will eject spontaneously. A while ago this happened, and I just popped the disk back in, and after a few minutes I got a dark screen with a tiny line in the upper left corner of the screen. Nothing happened after that and I eventually shut it down.
I am able to get it into Target mode, but the G5 I have (on 10.5.8) doesn't mount it, so I can't even run disk utility.
I've taken the battery off and hit the power button for 5-10 seconds. I've taken out and put back in the RAM boards. I've switched their positions.
I've tried starting it up in single-user mode, but it won't do it. The power light won't come on, and the "caps lock" light doesn't come on. If I start it up with the option key pressed, the mouse pointer appears and responds to the track pad but then locks up after a few minutes. (This is the ONLY time the mouse pointer ever shows up).
It's looking like the guy who sold it to us is going to be a creep and not take it back. So if there's anything to be done, I would REALLY appreciate the help!!
Thanks ...
Lisa

Honestly, it sounds like this system has some pretty serious issues, and will likely need some expensive repairs. So, you can try taking the seller to small claims court for the cost of the machine, but ultimately you're probably just going to have to accept that you got ripped off and eat the cost. But take it to an Apple Store or AASP in your area to get them to diagnose what's wrong with it. My guess is they're going to say logic board, which will probably cost about as much as you paid for the system. But maybe there's something simple and cheap they can find.
Sorry you ended up getting ripped off, that's never fun. A repair estimate may help if you go to small claims court, and it is unlikely to hurt. If you decide to not go to small claims court, then be sure to name and shame the seller everywhere. However, that WILL likely HURT your chances of winning in small claims court, so only do it after or if you rule that option out.

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The NEW macbook Pro and Air are EXTREMELY close in form factor
The newest macbook Pro is essentially a larger macbook Air with Retina display and options for speed in increasing prices up to an independent graphics and quad core processor.
both Air and new Pro now have PCIe SSD and permanent RAM.
The Air is the lightweight portable form factor, fast to boot and shut down, but with longer battery life than any of the macbook pro in 13"
Now the new macbook Pro and macbook Air are extremely close in form factor and nature.
both have 802ac wifi
both have permanent RAM, no superdrive
both are slim profiles and SSD
The only real differences now are (in the most expensive Pros) faster processors and quadcore processors and top end model autonomous graphics.
....and of course the retina display
both are now "very good for travel"
Other than features the form factor of the Air and Pro are VERY close now,....so now its merely a matter of features and price more than anything.
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Maybe a “macbook Air PRO with Retina display”
Instead of Air VS Pro now,.....its really a smooth transition from Air to pro without comparing say, 2 different creatures, now its like contrasting a horse from a race horse.
Either one in 8gig of RAM (preferably)... the 4gig upgrade costs very little, the I7 you will notice only 15% faster on heavy applications over the I5, and NOTHING on most APPS.....I5 has longer battery life.
As you see below, the non-Retina 13" AIR is 82% of the Macbook with Retina display in resolution
there is no magical number of pixels per inch that automatically equates to Retina quality.
http://www.cultofmac.com/168509/why-you-might-be-disappointed-by-the-resolution- of-those-new-retina-display-macs-feature/
A huge internal SSD isnt a game changer for anything, you need an external HD anyway
what you WONT READ on Apple.com etc. is that the larger SSD are MUCH FASTER due to SSD density
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http://blog.macsales.com/19008-performance-testing-not-all-2013-macbook-air-ssds -are-the-same
Here is an excellent video comparison between the 11” I5 vs. I7 2013 Macbook Air.
http://www.youtube.com/watch?v=oDqJ-on03z4
http://www.anandtech.com/show/7113/2013-macbook-air-core-i5-4250u-vs-core-i7-465 0u/2
I5 vs. I7 performance 13” Macbook Air 2013
Boot performance
11.7 I5 ……11.4 I7
Cinebench
1.1 I5….1.41 I7
IMovie Import and Opt.
6.69 I5….5.35 I7
IMovie Export
10.33 I5…8.20 I7
Final Cut Pro X
21.47 I5…17.71 I7
Adobe Lightroom 3 Export
25.8 I5….31.8 I7
Adobe Photoshop CS5 Performance
27.3 I5…22.6 I7
Reviews of the newest Retina 2013 Macbook Pro
13”
Digital Trends (13") - http://www.digitaltrends.com/laptop-...h-2013-review/
LaptopMag (13") - http://www.laptopmag.com/reviews/lap...play-2013.aspx
Engadget (13") - http://www.engadget.com/2013/10/29/m...-13-inch-2013/
The Verge (13") - http://www.theverge.com/2013/10/30/5...ay-review-2013
CNet (13") - http://www.cnet.com/laptops/apple-ma...-35831098.html
15”
The Verge (15") - http://www.theverge.com/2013/10/24/5...w-15-inch-2013
LaptopMag (15") - http://www.laptopmag.com/reviews/lap...inch-2013.aspx
TechCrunch (15") - http://techcrunch.com/2013/10/25/lat...ok-pro-review/
CNet (15") - http://www.cnet.com/apple-macbook-pro-with-retina-2013/
PC Mag (15") - http://www.pcmag.com/article2/0,2817,2426359,00.asp
Arstechnica (15") - http://arstechnica.com/apple/2013/10...-pro-reviewed/
Slashgear (15") - http://www.slashgear.com/macbook-pro...2013-26303163/

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playadelcarmen wrote:
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Old Topic, looking for newer answers....iMac (Late 08 model) shuts off

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