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142 Posts

03-31-2008

California

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  • Message 11 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-08-04, 1:33 AM

You clearly have not read the thread, nor the TITLE of the thread.

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13 Posts

06-19-2015

AT

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  • Message 12 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-08-04, 7:51 AM

richk: I can't speak for the others here, but I know for sure that my CMOS battery was replaced.

 

 

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13 Posts

06-19-2015

AT

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Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-08-04, 7:56 AM

Thanks for this info. I was wondering about the battery. I have read somewhere else that taking out the battery (or batteries for me) and replacing would work. The T430s is still being used by one of my tech guys as a desk-top until I have time to buy and reconfigure a replacment.

 

Then I'll look at doing a power trace. I am also of the opinion that there is a general hardware flaw that shows up in very small percent of T430s (aren't we lucky!) and causes a short when the power cord is inserted under certain conditions.

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2 Posts

09-18-2016

US

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  • Message 14 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-09-18, 6:50 AM

I signed up on this site just to respond to this issue. We have two T430s laptops and one of them responds exactly as stated in the original posting. The 0251 error would come on anytime the computer was plugged in to recharge after use. My first response was, as some have suggested, change the CMOS battery. Even though the battery tested OK I installed a new one but continued to get the 0251 almost every time the power supply was plugged in. I never experienced this error message as long as the computer remained plugged it or remained off the power supply. The error only showed up on plugging in the power supply while the computer remained on. The error does not appear if the computer is first shut down before plugging in the power supply then rebooting. I also found that if the power supply was not plugged in, the computer could remain on and the power supply plugged in with no error. The only time the error shows up is if the computer in on and the power supply is powered up. As long as the power supply was unplugged from the wall outlet before plugging into the computer I don’t get the error message. For the last several weeks I have been making sure to have the power supply disconnected from the wall before hooking it to the computer and have not once gotten the error message. I’m neither a computer or electrical expert but I suspect the act of plugging in a live power supply to a live computer is causing some issue at the plug and the BIOS is momentarily losing power. This has worked for me and beats repeatedly going into the BIOS to reset the date and time.

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2 Posts

09-18-2016

US

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  • Message 15 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-09-18, 6:59 AM

I signed up on this site just to respond to this issue. We have two T430s laptops and one of them responds exactly as stated in the original posting. The 0251 error would come on anytime the computer was plugged in to recharge after use. My first response was, as some have suggested, change the CMOS battery. Even though the battery tested OK I installed a new one but continued to get the 0251 almost every time the power supply was plugged in. I never experienced this error message as long as the computer remained plugged it or remained off the power supply. The error only showed up on plugging in the power supply while the computer remained on. The error does not appear if the computer is first shut down before plugging in the power supply then rebooting. I also found that if the power supply was not plugged in, the computer could remain on and the power supply plugged in with no error. The only time the error shows up is if the computer in on and the power supply is powered up. As long as the power supply was unplugged from the wall outlet before plugging into the computer I don’t get the error message. For the last several weeks I have been making sure to have the power supply disconnected from the wall before hooking it to the computer and have not once gotten the error message. I’m neither a computer or electrical expert but I suspect the act of plugging in a live power supply to a live computer is causing some issue at the plug and the BIOS is momentarily losing power. This has worked for me and beats repeatedly going into the BIOS to reset the date and time.

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13 Posts

06-19-2015

AT

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  • Message 16 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-09-18, 13:46 PM

Thanks very much for this. Desktop replacement hardware arriving next week, after which I'll test your theory, as well as working with a hardware repair firm locally to see if we can pinpoint where the short comes from. 

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1 Posts

10-02-2016

DE

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  • Message 17 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2016-10-02, 10:34 AM

I have the same issue, but testing with an unplugged sower supply is quite different as I am using a docking station - which is by nature always be powered on.

Please try to remove the battery and put in the battery before plugging the power supply, I think in some cases that helps.

Looks like that is an error with a couple of the same series, wondering why Lenovo not have any solutions.

Unfortunately my problem started shortly after warranty was over.

 

 

 

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1 Posts

11-22-2017

CA

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  • Message 18 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2017-11-22, 20:00 PM
Any updates on this issue? I have the same problem now - when I plug in power supply, when PC is in stand-by mode, it always loses the "slept" condition and shows that error. I feel, this some how is related to powermanagement application, as I was able to fix it by playing with different modes in power saver. Now it happened again, and so far no solution.
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3 Posts

02-03-2019

NO

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  • Message 19 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2019-02-03, 11:49 AM

jlalbrecht

I am following up on this old thraed with you.
Did you by means discovered the real cause of this issue and any resolution?

My Lenovo T431s is making me crazy with exactly this same issue.

 

Thanks

hameed

 

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13 Posts

06-19-2015

AT

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  • Message 20 of 38

Re: T430s gets a 0251 error when power cord inserted, CMOS battery has been replaced

2019-02-03, 13:07 PM

Sorry, not yet. Busy times at work. We did replace the laptop so it is not needed for daily work. It is on the list of things "to get started on" this quarter. I'll post when I know more!

 

Kind regards,

Jack

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