MacBook Pro :: Core Duo Turns Itself Off/reboots On Its Own?
Oct 4, 2009
I've been digging around for a couple weeks now for information on what may be happening to my MBP. I've tried numerous solutions, but don't seem to be able to get the computer to STAY ON. Here's my story:
A couple weeks ago, my room mate was using the computer. She closed it to put it to sleep, and left it on my bed. When I went to turn it on, the screen was completely black and the indicator light on the open button was a steady grey. The computer was so hot it was painful to the touch. I unplugged it, hard powered it off, and let it sit, thinking it was an overheating issue.
Since then, the damn thing won't stay on. Initially, it would intermittently just shut off. When that happened, sometimes I could boot it back up, and other times it would sound like something was whirring in the background, but the screen stayed black and the indicator light stayed solid grey. I installed SMCFan and istat to monitor/control the temp and fans.
I noticed somewhere along the way that there seemed to be some connection between episodes of shutting down and the power cord (as in, if it was jostled, the computer shut off)(I should note that my battery is at about 15% health with a full charge). Then, that power cord died (no green/amber indicator light and no connection detected). So I bought a new cable, and set about trying to fix the problem again.
Next phase, it seemed that if I moved the computer, it shut down. So I did some of the recommended fixes. I deleted the power management plist, I changed the settings to never put the computer or the display to sleep, and I turned off the quick-motion sensor that stops the hard drive. I also reset the SMC settings.
This seemed to improve the situation a little bit, insofar as now instead of getting a shut down, I am now getting complete reboots that only *sometimes* lead to the blank screen and steady grey indicator light. This does happen more frequently if I move the computer, but it can also happen if I simply leave it to run. In fact, if I send the computer into sleep-mode, and close the lid, I'm practically guaranteed a reboot.
So, then I reset the PRAM and did the hard-reboot (ctrl+opt+power) and reset the PRAM again. I am currently running Rember to test the RAM, but I'm not sure what to look out for when it finishes, or what I should do about it.
My first mini has a problem. It will power on with the light and then promptly turn off in about 3 seconds. The hard drive spins up but the fan does not turn on. No image on the screen or anything. the mini is open for diagnosis and will do the same thing if the CPU is not installed. Interesting question what will a mini do when it is powered on but doesn't have its CPU installed?
I see the numbers of everything from Core 2 Duo, to the slightly faster and cooler Core i3, to the supposedly faster core i5s and i7s. The benchmarks go up accordingly, but I found this does not always equate in a faster experience on most tasks.
Here's my experience so far on processor upgrade:
In one computer trade school re-certification class I am in, we are working with Windows Server 2003 on a Quad Xeon platform and it's incredibly slow.
But in a previous class we had the previous generation server edition on older Xeons, and while not fast, it was much better. On paper the newer multi-core Xeons should have made a difference, but could 2003 server software be that much more bloated than the previous Windows server edition that it would stall like that and make us wish we had the older setup?
I am going to try out the Adobe CS lab and put the new high end Dells to the test there and see if they work better than when we had an older CS version on older Xeon equipped Dells.
I don't know if this is something to do with Dell, or if Apple's increasing processor bumps/generations are going to similarly not make a difference in the speed things appear to go at, whether it's Adobe stuff, server stuff, or anything else that needs power.
I know somebody who plans on a Core 2 Duo, i5 or i7 MBP and I was wondering if the higher end processor is worth it in that case (iMovie being the main program of use).
There's a lot of people wondering if the 13" MBPs would have been a lot better with a Core i3 processor, but everything has been just hangups over perceived old vs. new technology, and really the only thing the Core i3 adds is Hyper-Threading, but it doesn't have Turbo Boost, which helps the Core i5/i7s tremendously. Let's compare using Geekbench since it is cross-platform and one of the few available sources of info...
Core 2 Duo P8600 2.4GHz (~3362)
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vs.
Core i3 330m 2.13GHz (~3472)
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Core 2 Duo P8800 2.66GHz (~3700)
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vs.
Core i3 350m 2.26GHz (~3680)
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As you can see in both cases, the difference is pretty minimal indeed, and in single threaded applications, the C2D will easily outdo the Core i3 which lacks Turbo Boost and runs at lower clock rates.
And you get a 320M instead of Intel HD graphics with the new 13".
The Geekbench results from the old 15/17" to the new 15/17" are quite an order of magnitude better.
So unless people are expecting Core i5 processors in the 13", sticking to the C2D was actually a good decision, and given the differences between 2.4 and 2.53 isn't so large, one is far better buying the base 13" and then putting the money saved towards a good 7.2k HDD or SSD.
Note - I took averages of the 32-bit numbers and added them.
Note 2 - The C2D Pxxxx are 25W TDP processors, which are more efficient than the Core i3 which are 35W TDP processors. Less heat, better battery life from C2Ds.
I've been debating whether or not to upgrade my 3 year old 15" Macbook Pro that has a 2.2Ghz Core 2 Duo (Santa Rosa) to the new 13" 2.4Ghz Macbook Pro. FYI... My current system also has 4GB of RAM. Since both systems are Core 2 Duo, what kind of speed bump am I going to see? Would this be a substantial upgrade?
I'm buying a new MacBookPro but can't decide, due to lack of knowledge, wich one to choose and if there's a noticeble difference between, 15.4" MacBook Pro Notebook Computer 2.2GHz Intel Core i7 Quad-Core4GB of DDR3 RAM500GB 5400rpm Hard DriveAMD Radeon HD 6750M 512MB Graphics15.4" LED-Backlit Glossy Display1400 x 900 Native ResolutionSlot-Loading SuperDrive802.11a/b/g/n Wi-Fi, Bluetooth 2.1+EDRFaceTime HD Camera, Built-in MicrophoneMac OS X 10.7 Lion (64-bit)
and the 13.3" MacBook Pro Notebook Computer 2.8GHz Intel Core i7 Dual-Core8GB of DDR3 RAM (2x4GB)750GB 5400rpm Hard DriveIntel HD 3000 Graphics13.3" Glossy Widescreen Display1280 x 800 Native ResolutionSuperDrive, Secure Digital Card SlotFaceTime HD Camera, Omnidirectional Mic802.11n Wi-Fi, Bluetooth 2.1+EDRMac OS X 10.7 Lion
Besides the screen size, one would be considerable faster?
I use Photoshop and beeing a photographer I deal with large files.
Info: MacBookPro 2.66GHz 4GB 1067MHz DDR3, Mac OS X (10.6.2)
The ivy bridge processors are coming out soon (or may already be out). I have heard that macbook pro 13" models might be able to use the new processers due to their lower energy useage. I presume that I will be able to take my mac to an apple store and have it installed. Is this information true?
Info: MacBook Pro (13-inch Early 2011), Mac OS X (10.7.4)
2.- I tried to turned on pressing the turn on/off button and it did not do anything.
3.- I disconected the computer form the wall and wait for some minutes, and it did no do anything.
4.- After about 20 minutes i tried again and turned on by pessing the on and off button.
5.- The imac turned off again and disconected form the wall and conected to another electrical contact at the wall, adn it did not turned on. i wait for some minutes and turned on again, but after about five minutes it turned off again.
6.- I left the imac connected to the wall for a couple hours and i tried to turned onn by pessing the on/off button and it did not turned on.
7.- I left all night connected form the wall and tried to turn it on this morning and it did not turn on.
8.- This time, I only disconnected the imac cord form the back of the computer and left it for a couple of hours, then I concected and turned on
9.- All the times that the computer turned on it started like a restart and no announce or windows appear telling me about an error or something like that.
10.- One of the times I touched the computer at the back and felt it hot, not too hot, but I do not how normal is.
11.- I can feel some very, very little air at the back form the vent.
What do I hve to do? What kind of tests can I do to know if the computer's an is working ok?
Although i'm hardly impressed by the prices and specs of these 'new' machines I need one so I'm buying!
Just need to know before I make the plunge. Is the i7 variant with the extra GPU ram really worth it? I would use the extra power in my work but I honestly need to know if I'd notice any difference as for a few seconds less waiting it would hardly justify the price.
I have an old black MB 2.16 ghz C2D. At times, it locks up and randomly reboots. Sometimes, it gets crazy and reboots again after its done booting up. Sometimes, I get this gray screen that says I have to hold the power button as well. I don't really notice the laptop getting warm at all or the fans turning on that much. I just reinstalled the entire OS and Snow Leopard. I just got a new MBP, so I haven't really been using that one as much (or at all). So, it's hard to say if that fixed it. My applecare runs out on 5/29/2010. And if it's a hardware problem, I'd like to get it fixed prior to my warranty expiring.
First couple of times this has taken place I thought I was making a mistake or possible a power setting somewhere but finally yesterday I realised after checking all settings that my MacBook is actually rebooting and closing all apps for some reason.
Typically occurs when left alone for a hour - not every time - but at least 5 times so far this month. Has anyone else experienced this or do I just have a defect problem with the hardware? What can I do to troubleshoot this? Are there any system logs in this OS that would give me some clues if this is applicaton or hardware related?
My new Macbook Air (bought one mounth ago) reboots automaticaly. It happens randomly, usually when I'm using Safari or Skype. It shuts down without any warning and log-out process, and it's keyboard keeps unresponsive about 1-2 minutes and then boots up automatically. I'm not using any "Disk cleaning app". I have reinstalled OS but unexpected reboots keeps happening.
Info: MacBook Air (13-INCH, MID 2011), Mac OS X (10.7.4)
Last week I bought a new model 15" MBP which spontaneous reboots every hour or so. Yesterday I returned it and received a new one (including new power supply etc). This one however does the same. Yesterday evening I started a Time Machine restore which was stopped in the middle because of a spontaneous reboot.
I resetted everything (SMC, PRAM, etc.) and tried again. Still reboots after apprx an hour. It doesn't run too hot (67C, 2100RPM). What can be wrong?
I have an old macbook and it has ha no problems up until now. I just hooked it up to an HDTV through its mini-DVI port to hdmi. Now I have random reboots in the middle of watching videos. Is this common? Is there any way to fix it?
I just bought my new 2012 macbook pro a couple weeks ago, and so far it has crashed and rebooted by itself four times. Three of those four times, I had only been running a couple programs, such as Chrome and Mail, while all others were closed. the entire computer will freeze for about 6-7 seconds (no response to mouse movement/keyboard) and then shut down and reboot.
Is this a bug with OS X Lion? or the new macbook Pro? or my macbook pro specifically indicating there's some sort of defect?
Info: MacBook Pro (13-inch, Mid 2012), Mac OS X (10.7.3)
My MacBook Pro (OSX 10.9.4) reboots automatically when opening images or websites with images that change rapidly or when switching rapidly from an image to another or sometimes on slides on Diaporama.
Whenever my Macbook powers down to 0 battery life and reboots from a new charge, I loose all my software settings, including browser cache, adobe settings etc. It's really annoying. I have a brand new MacBook Pro 15" 2.2Ghz i7.I'm running OSX 10.6.8 on it (I reverted because I didn't like Lion).
I have a mid-2010 Macbook Pro with a 2.53 GHz Core i5 processor and 8 GB of RAM, running OS X 10.10.1. For the last few weeks, at apparently-random intervals, the machine has been rebooting while I've been using it. I can't tie this to anything in particular that I'm doing. It may go a couple of days before a restart, or it could be like today, where it's happened five times in the last four hours. I've tried resetting the PRAM and the SMC without apparent effect.
When the reboot happens, the system first freezes for roughly 30 seconds--the mouse pointer won't move, it's unresponsive to keyboard input, etc. The system then appears to power down--the screen and external monitor go dark, fans stop, keyboard backlight goes out. A few seconds later, it powers up, gives the boot chime, and goes through the normal boot sequence. At no point does it give the "your computer was restarted because of a problem" message, and I don't see anything in the Console app that looks like a kernel panic.
About two years ago, the logic board was replaced to address a somewhat-similar issue--the system had been freezing and could only be recovered by a hard power off (holding down the power button for several seconds).
I'm not sure where to start looking for the cause of this problem, since I can't figure out anything in common with the circumstances surrounding the reboots.
Info: MacBook Pro (15-inch Mid 2010), OS X Yosemite (10.10.1)
I wanted to know if I can replace the upper case of a Core Duo white macbook with that of a Core 2 Duo black macbook? The white one has the distinctive yellowing of the rev A macbooks, so i'd like to make it better whilst making a black/white frankenMac.
I need the thoughts and advice from your seasoned Mac people - I have 2 MBP's - 1 15" aluminum, one last years model 17" Unibody (with Black around screen). The 15 has run great since day one. The 17" was ok, but now is locking up and causing me to reboot, fans seem to run on high all the time, and it is very slow to react while using the OS, it gets worse until it locks up. I have upgrade to Snow Leopard thinking that that might fix it, but it has not.
When I got it, I restored from the back up of my 15" using carbon copy cloner. I only imported users and data such as pictures and music. Do you guys think that this is a hardware issue or a or should I back all my stuff up and then blow everything away and reinstall from the ground up with a fresh SL install?
When I called apple they tried to sell me apple care and told me that it was out of the full warranty and if I send it I would to pay for what was not under warranty. SO I am hoping that someone has seen this and has a fix that I can do without having to take it in.
Just curious as to how much of an improvement in performance I would see upgrading my system as it states above, since my 2006 machine is 3 years old and getting close to the end of my apple care, figured I would trade it in and upgrade.
I am looking to purchase my first Macbook Pro. I am having a difficult time deciding between a $1749 17" from Amazon that is the older 2.8Ghz Core 2 Duo and the $2298 17" (w/ student discount and tax... have to include tax) from Apple that is the newest model. The price difference is $549.
Some things I'm curious about:
1. Intel HD card? Does it really cause that much lag? How is it compared to the nVidia 9400m? I don't mean benchmarks, I mean real life performance.
2. Battery life? Is the battery life in the newest model much better than previous gen?
3. Heat? Is there a difference in heat production between them?
I don't care about gaming, so the 512 300m vs. 512 9600m is no concern.
Does the newest 17" justify the $549 price difference? Are there any other things that I should know between the two?
Has anyone that know if it's possible to upgrade MacPro Nehalem 2.26 to 2.66 Ghz Westmare with the following processors : Intel Hexa Core Xeon? Processor X5650 12M Cache, 2.66 GHz, 6.40 GT/s Intel? QPI part #:BX80614X5650 ? Could you help me telling if it?s possible to upgrading MacPro Nehalem octa core 2.26 Ghz to Mac Pro Westmare hexa core 2.66 Ghz ?
