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Paper Tape
Posts: 1
Registered: ‎11-10-2017
Location: CA
Views: 631
Message 1 of 2

T520: won't run on battery, fuse suspected

I guess this is a very old thread, but I am having the same problem with my ThinkPad T520.

The battery is fine, but it will not power the laptop. I'm thinking it may be a pico fuse on the motherboard.

Turning the laptop off for a few minutes as suggested does not work. Taking the battery out and pushing the power button for 30 seconds does not work. Buying a new battery just because Lenovo says my old one is dead does not work for me.

Anyone else having similar problems?


Moderator note: post moved from 6-year-old B & G thread to T series forum for visibility.  Subject edited to match content.  Was:  Re: Reset Surge Protector on Motherboard - PLEASE HELP

Community SeniorMod
Community SeniorMod
Posts: 9,376
Registered: ‎01-01-2010
Location: US
Views: 600
Message 2 of 2

Re: T520: won't run on battery, fuse suspected

There is a fuse and there are power transistors.  Either can fail.  It is best if you can get another battery to try, especially if yours is an aftermarket one, since they often fail.


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.

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