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28 Posts

09-28-2009

SoCal, USA

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Re: T400s random shutdowns

2009-10-01, 15:27 PM

It happens on ac with battery and on ac without battery. It also happens, when just on battery also.

 

With regards, to the power/fan settings - if it was that, then the user who had the two t400s and switched the hard disk would have seen the same problem occur on the good unit?

 

I've touched the fan area after the machine powered off and it did not feel that hot.

 

I had machine playing video / graphics without it powering off and then other times, it just sat at the login screen and it will power off.

 

 

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55 Posts

06-10-2008

Germany

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Re: T400s random shutdowns

2009-10-01, 17:11 PM

Hello,

No I don't think it is a matter of overheating, but rather a matter of communication between power management

in the bios and  the different devices. Sugrat convinced me that this is not a Windows probelm, nor a lenovo power management issue. But maybe the power settings in bios?

 

The computer when put on maximum performance mode for the fan makes the fan spin irregularly in my case though I was just staring at the desktop (no load of anything, not even explorer).

Can anyone check this and tell me if teh fan spins irregulary? i.e. it oscillates between two speeds. The way to proceed is to change in AC mode to maximum performance mode for the fan control in the lenovo power management software and then load the computer a little bit to heat it up until the fan starts. Then close all these applications that made heat up the machine and wait. In mz case, the fan goes slower, as expected, but does not stop but rather oscillates.

 

Anyway, the issue here is the random shutdown, in this case, it seems from the experience in this thread that it is likely to be either mother board or bios, from what I understand. I make a bet it is the bios, but I have no clue on how I can check this. Today I voluntiraly turned on the computer for all the day at home and went to work by disabling sleep and hibernate on AC mode. In coming back, the computer is still on with WLAN on, perfeclty silent and cool. But I had shutdowns yesterday.

T61, UZ2AQGE 2.5 Ghz, XP Pro SP3
T400s, NSF20UK, 2.4 GHz, SSD 128 GB, Vista B
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10 Posts

09-23-2009

Santa Barbara, CA

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Re: T400s random shutdowns

2009-10-01, 17:32 PM

A couple of updates since my first post a week ago:

 

1) Lenovo offered to RMA the original T400s for 100% refund under their 21 day money back guarantee.  They also offered to price match my first order for a new identical unit.

 

2) I purchased two "ThinkPad Mini Dock Plus Series 3" (one for home, one for work).  These come with 90W PSU's vs. the 65W included with the T400s.  Since using the dock's with the 90W PSU's I've not experienced random shut-off's.  On battery no problems either.

 

Chris.

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9380 Posts

11-27-2007

Slovakia

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Re: T400s random shutdowns

2009-10-01, 20:14 PM

ChrisFSB, that's an interesting observation.

 

Is anyone else posting in this thread able to confirm an improvement using a 90W Power Adapter? (Should you happen to have one at hand?)

 

Thanks in advance

Andy  

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28 Posts

09-28-2009

SoCal, USA

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Re: T400s random shutdowns

2009-10-01, 20:16 PM

I have that dock and that is the powersupply connected to it and still the same results.

 

So to confirm, when on the dock with the 90w, still powers off.

 

When connected to the standalone ac, which is 65w it still powers off.

 

Side note, i still haven't had a power off yet today (fingers crossed)....

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64 Posts

09-29-2009

Australia

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Re: T400s random shutdowns

2009-10-01, 23:25 PM

 


wrote:

I have that dock and that is the powersupply connected to it and still the same results.

 

So to confirm, when on the dock with the 90w, still powers off.

 

When connected to the standalone ac, which is 65w it still powers off.


 

 

I can confirm this also. Mine has only powered off twice in ~3 weeks (used everyday), once while using the 65W AC Adapter and the other while in the dock (90W AC Adapter).

 

I also don't believe it's a overheating issue, since both times the machine was idle (no CPU intensive applications running) when it shutdown.

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55 Posts

06-10-2008

Germany

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Re: T400s random shutdowns

2009-10-02, 7:37 AM

That it is independent from the 90W vs 60W plugs is consistent with the fact that T400s poweroff with the battery only.

I will keep the computer on for the all day today, if anyone has a trick to try locate the origin of this problem he can tell me.

In my case the shutdowns are rare so far since it happenned only once since one week (I bought it last week),

so testing is difficult,,, but I try to do it.

 

Proposal: If any of you have regular shutdowns, I have a check up that maybe helpful. The idea is to turn on the computer and press F1 to go to the BIOS settings, and once loaded into BIOS just leave the computer like that and wait until to observe sutdowns or not.

I am not sure if this can cause dammage, maybe a professional can confirm, I guess not, but it might give more information on how this important issue works?

See you all

 

T61, UZ2AQGE 2.5 Ghz, XP Pro SP3
T400s, NSF20UK, 2.4 GHz, SSD 128 GB, Vista B
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28 Posts

09-28-2009

SoCal, USA

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Re: T400s random shutdowns

2009-10-02, 21:27 PM

I'm not sure if this has anything to do with it but i turned off the virtual settings in the bios the other day because i had been a few weeks back testing some vmware software and had removed it but not changed the bios setting back and so far my machine has been up for two days without powering off.

 

It might be something.... anyone else confirm they are running with those settings disabled/enabled?

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55 Posts

06-10-2008

Germany

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Re: T400s random shutdowns

2009-10-02, 22:25 PM

Can you tell me/us precisely how to get to the virtual settings menu? Sorry I am ignorant!

Can you turn it on again and see what happens? When did you turned it off? I mean, you noticed an immediate change?

T61, UZ2AQGE 2.5 Ghz, XP Pro SP3
T400s, NSF20UK, 2.4 GHz, SSD 128 GB, Vista B
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28 Posts

09-28-2009

SoCal, USA

105 Signins

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  • Posts: 28
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  • Message 90 of 613

Re: T400s random shutdowns

2009-10-02, 22:46 PM

Not a problem, it's under the cpu settings in the bios and it's called it's called "Intel Virtualization Technology" and it's designed  to help virtual machines you might be running on the machine.

 

I can't turn it on today because i've got to get some project items finished but i can next week.

 

There's no difference in any of the items when you enable/disabled, the only thing i've noticed is that my machine has stayed up for two days now, where before i had it powering off daily.

 

I'll keep you updated.

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