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Laptop won't charge when plugged in but will charge when its off

2018-06-19, 21:37 PM

Hi, I bought Lenovo ThinkPad P51 this year. I have windows 10 installed on it.

 

The laptop won't charge when it is on. It will only charge when the the laptop is completely off (it will charge to 100%).

 

I discovered this problem when I was taking an online university exam. After utilizing all the battery, the laptop stopped working even though the battery charger was still plugged in to laptop all this time. The orange light near the power connecter is on when the laptop is off) but goes away when laptop is on. 

 

Please advise

Thanks!

 

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Re: Laptop won't charge when plugged in but will charge when its off

2018-06-19, 21:43 PM

Nothing to do with Airplane Mode... its off

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Re: Laptop won't charge when plugged in but will charge when its off

2018-06-19, 23:13 PM

what is the wattage of your charger?  It needs 170w.  It sounds you are using a charger that is being detected as 90w.  Is it a Lenovo charger or aftermarket?


Rich


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Re: Laptop won't charge when plugged in but will charge when its off

2018-06-20, 0:27 AM

Hi, Thanks for the message.....It is an original Lenovo charger that came with new Lenovo ThinkPad P51. I am presuming that it is 170 Watts. How do I find if its 90 or 170?... It is heavy in weight compared to other laptop adapters that I have used. It can charge 100% when the laptop is off.

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Re: Laptop won't charge when plugged in but will charge when its off

2018-06-20, 5:15 AM

If it is big, it is probably 170w.  Start Lenovo Vantage.  Under hardware settings/power, it should show the wattage of an attached adapter.  The wattage is determined in the power circuitry (motherboard) by measuring the resistance between the center pin and ground (rectangular plug outer surface).  90w is 550 ohms; 170w is 1.9k ohms.


Rich


To help with forum searches, check this out: https:/forums.lenovo.com/t5/Welcome-FAQs/Using-Browser-Search-to-find-your-answers-in-Lenovo-and-Moto-Community/m-p/5016916

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Re: Laptop won't charge when plugged in but will charge when its off

2018-06-20, 17:06 PM

I manged to find the problem through Lenovo Vantage. It turns out to be Airplane power mode problem afterall.... I just had to uncheck enable autodetection for airplane mode. It was strange because on the bottom right corner, the airplane mode was off, but it was not off in Lenovo Vantage.

 

Thanks a lot! Cheers!

0 person found this solution to be helpful.

This helped me too

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01-07-2020

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Re: Laptop won't charge when plugged in but will charge when its off

2020-01-07, 4:17 AM

Been poking around Lenovo Vantage quite a bit and still can not find where the referenced Airplane Power Settings are. Could one please give more specific advice where to find it?

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Re: Laptop won't charge when plugged in but will charge when its off

2020-01-07, 7:19 AM
Hi,
It could be the version of Lenovo Vantage you are using.

Try with the Enterprise version of Vantage:
https://forums.lenovo.com/t5/Lenovo-Vantage-Knowledge-Base/New-version-of-Lenovo-Vantage-10-xxxx-is-missing-features/ta-p/4498027

Martin

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Main: P52 (I7-8750H P1000 FHD 16GB 512GB-SSD 1TB-HDD)
Also, 2x M820z, 1x P520c, 1x ideaCentre 300S-11IBR

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Re: Laptop won't charge when plugged in but will charge when its off

2020-02-02, 19:00 PM

Yes, that fixed it for me as well.  This problem started out of the blue and then seemed to fix itself and then come back a while later.  Maybe it was happening every time I flew?  Anyway, this is a software bug that Lenovo should fix.  I had never even logged onto the Vantage app before, but sure enough, that's where the problem was.  

 

In Lenovo Vantage (which you can find by doing a search in the task bar), go to My Device Settings and then Power and then Battery settings and you will see Airplane Power Mode.  Turn that off and un-click auto detection.  

 

I have a ThinkPad P52 bought in 2019.

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06-30-2020

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Re:Laptop won't charge when plugged in but will charge when its off

2020-06-30, 15:38 PM

Hi, I've the same issue, but I couldn't find the airplane power mode setting on lenovo vantage or any where else. Did anyone went through this issue?

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