T400 laptop is restarting while in use
Hi,
I bought T400 laptop last week.
It did restarted while i am using the system. it happened twice with in this week.
When i am using the laptop, it suddenly went into blank and restarted.
Please let me know if i need to update any drivers or need to do something for this issue.
Thanks
Ashok
Have you tried updating the BIOS to the latest version? Does the pc overheat or any sort of peculiar symptoms?
moderator note: It would also be helpfull if you could please update your profile with your correct country location as per the forum rules. Products, options and services vary from market to market. Knowing your location helps us help you.
Message Edited by Agotthelf on 26-03-2009 06:28 PM
SL500 2746-22U WIn Vista Bu 32 bit
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For more information, take a look at:
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This thread is exclusive to people who have spontaneous crashes/reboots/restarts while their Mac is in sleep. (this is usually connected to having a USB external hard drive plugged in the computer while on sleep)
In simple words, you are experiencing this problem:
1) You put your Mac to sleep
2) You return to it after some time and you find it on.
3) On screen you find this error message "Your computer restarted because of a problem." or similar, and in the report of the error message the Event is "Sleep Wake Failure" or similar.
If your Mac does not wake from sleep this is NOT the thread for you, please don’t write here.
If your Mac is experiencing black screens and freezes while waking up from sleep this is NOT the thread for you, please don’t write here.
This thread is a continuation to the “New rMBP sleep/wake failure crashes” thread.
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PLEASE ANWSER THIS QUESTIONS BEFORE WRITING IN THIS THREAD FOR THE FIRST TIME
I suggest you copy and paste the questions below in your reply, and replace the text ANSWER with your answer.
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ANSWER
2. When did the problem start? If you had Mountain Lion installed on this machine, did the problem start when you updated to Mavericks?
ANSWER
3. Did you have your Mac replaced from Apple because of this issue? If yes, does the new machine still have the problem?
ANSWER
4. Does your machine crash/reboot while on sleep only if you have an external hard drive connected?
ANSWER
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ANSWER
OPTIONAL QUESTIONS
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ANSWER
7. Do you have a network connected drive? (like Time Capsule or an external hard drive connected to an AirPort Extreme, or a NAS)
ANSWER
8. Do you have Time Machine Enabled?
ANSWER
9. Do you have Crashplan installed?
ANSWER
10. How much time does it usually take for the first crash/reboot to happen, after you put the computer on sleep?
ANSWER
11. If you have a late 2013 MacBook Pro Retina, do you have discrete graphics in it? (In other words: do you have an NVIDIA GPU? If you don't know this, go into the menu bar, click the apple icon, click About This Mac, Click More Info, in Graphics you should find written “NVIDIA GeForce”.)
ANSWER
PS
Please forgive any mistakes in this text, unfortunately english is not my native language.
<Email Edited by Host>1. Which Mac do you have? (If you have this issue with multiple machines, list them here)
Macbook Pro Retina late 2013. 512Gb SSD, 16Gb RAM, 2.3Ghz core i7 with discrete GPU.
2. When did the problem start? If you had Mountain Lion installed on this machine, did the problem start when you updated to Mavericks?
I purchased a 4TB WD MyBook and split it into two partitions with one of them being used for Time Machine. After that, I received the reboots during sleep.
The computer came preinstalled with Mavericks.
3. Did you have your Mac replaced from Apple because of this issue? If yes, does the new machine still have the problem?
No, I haven't had it replaced. I contacted Apple 4 days after the problem started. I had turned off PowerNap, but still had the problem. Apples asked me to disable Wake for Wi-Fi Network Access, and since doing that the problem has disappeared.
4. Does your machine crash/reboot while on sleep only if you have an external hard drive connected?
Yes (before I turned off PowerNap and Wake for Wi-Fi)
5. Does your machine crash/reboot even if you uncheck "Enable Power Nap" in Preferences, Energy Saver? (before answering this, check that you have updated OS X to 10.9.1 and that you have unchecked Power Nap in both the Battery and Power Adapter tabs in Energy Saver)
I have to have both PowerNap and Wake for WiFi disabled. If either is checked, the computer reboots. I've confirmed this with both 10.9 and 10.9.1.
OPTIONAL QUESTIONS
6. Do you have an external hard drive connected via USB? If yes, write the manufacturer name and model name of the drive. (example: Western Digital My Book)
Yes. Western Digital My Book 4TB. Split into 2 partitions.
7. Do you have a network connected drive? (like Time Capsule or an external hard drive connected to an AirPort Extreme, or a NAS)
No.
8. Do you have Time Machine Enabled?
Yes.
9. Do you have Crashplan installed?
No.
10. How much time does it usually take for the first crash/reboot to happen, after you put the computer on sleep?
4 hours. Checking the console log, my computer wakes itself at 2 hours for Time Machine (even if PowerNap is turned off, which is why Wake for Wi-Fi needed to be disabled, even the drive wasn't connected over the network, which really makes no sense) and then on the second wake, it has the Sleep Wake failure. Then it proceeds to reboot every 2 hours after when it wakes for Time Machine.
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Hi,
I bought a T400 laptop this summer and have it connected through the VGA port to an external monitor, using both the laptop´s monitor as an extended display. I would like to add a third monitor. I am wondering if there is any way to do this or anyone knows further, even if some additional hardware is required. There is no HDMI port on the laptop of course but I´m wondering if some sort of VGA splitter is possible. Any thoughts are appreciated!
Best wishes.Mavec wrote:
I would like to add a third monitor.
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I thought I read that it would be possible to use the iMac as an external display. I bought a cheap cable that is Mini-DisplayPort (M) to VGA (F), and I also bought a VGA cable (M-M). I plugged the cables into each other, then into the iMac, then into the Lenovo T400 laptop I have to use for work.
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Thoughts?
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I read that. It says, among other things "using a Mini DisplayPort to Mini DisplayPort cable or using a converter that converts other electrical, video, and audio protocols from another source device to Mini DisplayPort compliant signals. (Cables and converters available separately.)"
A 'simple' VGA to Mini DisplayPort adapter is not sufficient to provide "+Mini DisplayPort compliant signals+" as mentioned in that article.
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Are you saying that the Mini DisplayPort adaptors that go from Mini DisplayPort to VGA, which I bought, only go from Mac to VGA monitor, rather than in both directions?
Yes, that's exactly the point (see above).
Sorry
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I am connecting my Mac to TV 32'' via mini display port converted to HDMI.
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