Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

ThinkPad NotebooksThinkPad: P and W Series Mobile Workstations
All Forum Topics
Options

3 Posts

02-07-2019

United States of America

7 Signins

56 Page Views

  • Posts: 3
  • Registered: ‎02-07-2019
  • Location: United States of America
  • Views: 56
  • Message 1 of 7

P71 wont power from AC, but will from battery

2019-02-07, 21:06 PM

I have had the P71 Thinkpad laptop for about a year.  Today, it has the problem where it will only run on battery power.

 

Observations

----------------

With a battery inserted (and AC adater plugged in), the power icon in windows will only indicate AC power very briefly (a second or two) or not at all. It will indicate that it is on battery power even though the AC adapter is plugged in.

 

With a battery inserted (and AC adapter plugged in), the laptop will run fine, but the battery will deplete over a couple hours.

 

WIthout a battery, the AC adapter will only power the laptop for a few seconds

If the laptop is off, the AC adapter is able to charge the  battery.

The AC adapter *is* able to power the laptop in BIOS mode

 

If I remove the battery, the AC adapter will either only power the laptop for a few seconds (sometimes I can get to BIOS / windows), or not at all. *If* I do get to BIOS, the AC adapter seems to power the laptop fine.

 

Any help would be greatly appreciated.

 

 

Reply
Answer
Options

4018 Posts

12-02-2007

United States of America

9086 Signins

193558 Page Views

  • Posts: 4018
  • Registered: ‎12-02-2007
  • Location: United States of America
  • Views: 193558

Re:P71 wont power from AC, but will from battery

2021-04-21, 8:16 AM

Hello,


Check to see if the ThinkPad has been switched into Airplane Mode.  If it has, toggle that off and the battery should then charge as normal when the AC adapter is plugged in and the unit is running.

 

Regards,

 

Aryeh Goretsky

 



I am a volunteer and neither a Lenovo nor a Microsoft employee.

L380 YogaP72 (20MB-*)P50 (20EN-*)S230u (3347-4HU)T23 (2648-LU7)T42 (2378-R4U)T43p (2678-H7U)T61p (6459-CTO)W510 (4318-CTO)W530 (2441-4R3)W530 (2441-4R3)X100e (3508-CTO)X120e (0596-CTO)X220 (4286-CTO)X250 (20CM-*)Yoga 370

  Communities:   English    Deutsche    Español    Português    Русскоязычное    Česká    Slovenská    Українська   Język Polski    Moto English


Need an answer, fast? Try using Browser Search to find it in the Lenovo and Moto Community
Reply

Replies(6)
Options

158 Posts

07-14-2017

Greece

846 Signins

5122 Page Views

  • Posts: 158
  • Registered: ‎07-14-2017
  • Location: Greece
  • Views: 5122
  • Message 2 of 7

Re: P71 wont power from AC, but will from battery

2019-02-10, 5:52 AM

Can you test with a different power supply (from a friend maybe) ?

Better to be a totally different set (brick and the cables).

 

Other option: is the chassis power inlet physically ok ? No bends and twists and brakes of any sort.

Next option (the not nice one): AC power parts in the notebook broken or fried.

 

 

P52, 8850H, P2000, 2x16GB RAM
2x512GB NVMe, 1TB SSD
W10 pro
Reply
Options

11856 Posts

01-02-2010

United States of America

40157 Signins

422484 Page Views

  • Posts: 11856
  • Registered: ‎01-02-2010
  • Location: United States of America
  • Views: 422484
  • Message 3 of 7

Re: P71 wont power from AC, but will from battery

2019-02-10, 20:20 PM

What is the wattage of the adapter?


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
Reply
Options

2 Posts

04-19-2021

United States of America

2 Signins

15 Page Views

  • Posts: 2
  • Registered: ‎04-19-2021
  • Location: United States of America
  • Views: 15
  • Message 4 of 7

Re:P71 wont power from AC, but will from battery

2021-04-19, 17:04 PM

I am having this exact problem. Has anyone been able to find the root-cause of this problem and find a solution to this problem. I ran out of tricks and would hate to contemplate the idea that this is  unfixable hardware problem. Please advise! 

Reply
Answer
Options

4018 Posts

12-02-2007

United States of America

9086 Signins

193558 Page Views

  • Posts: 4018
  • Registered: ‎12-02-2007
  • Location: United States of America
  • Views: 193558
  • Message 5 of 7

Re:P71 wont power from AC, but will from battery

2021-04-21, 8:16 AM

Hello,


Check to see if the ThinkPad has been switched into Airplane Mode.  If it has, toggle that off and the battery should then charge as normal when the AC adapter is plugged in and the unit is running.

 

Regards,

 

Aryeh Goretsky

 



I am a volunteer and neither a Lenovo nor a Microsoft employee.

L380 YogaP72 (20MB-*)P50 (20EN-*)S230u (3347-4HU)T23 (2648-LU7)T42 (2378-R4U)T43p (2678-H7U)T61p (6459-CTO)W510 (4318-CTO)W530 (2441-4R3)W530 (2441-4R3)X100e (3508-CTO)X120e (0596-CTO)X220 (4286-CTO)X250 (20CM-*)Yoga 370

  Communities:   English    Deutsche    Español    Português    Русскоязычное    Česká    Slovenská    Українська   Język Polski    Moto English


Need an answer, fast? Try using Browser Search to find it in the Lenovo and Moto Community

0 person found this solution to be helpful.

This helped me too

Reply
Options

3 Posts

02-07-2019

United States of America

7 Signins

56 Page Views

  • Posts: 3
  • Registered: ‎02-07-2019
  • Location: United States of America
  • Views: 56
  • Message 6 of 7

Re:P71 wont power from AC, but will from battery

2021-04-21, 15:02 PM

A power surge / glitch  can put the laptop unexpectedly into airplane mode.  This was the cause when it happened to me and once I realized it and switched out of Airplane mode, the issue was resolved.  Take a look at this and see if you are in the same boat.  

Reply
Options

2 Posts

04-19-2021

United States of America

2 Signins

15 Page Views

  • Posts: 2
  • Registered: ‎04-19-2021
  • Location: United States of America
  • Views: 15
  • Message 7 of 7

Re:P71 wont power from AC, but will from battery

2021-04-21, 17:55 PM

Thanks for your prompt reply and tip. This fixed it!

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms