T440S sometimes won't boot unless i detach che internal battery

T430/T440 and T530/540 series specific matters only
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pictux
Posts: 46
Joined: Thu Oct 04, 2007 4:33 pm
Location: Treviso, Italy

T440S sometimes won't boot unless i detach che internal battery

#1 Post by pictux » Fri May 19, 2017 9:36 am

Hi everybody.
My t440s has now this annoying problem.
Sometimes (i mean: every 2 days or so) it won't boot.
Not only, if i attach the power cord, nothing happens (usually attaching the power cord, the red led blinks 3 times).
It seems dead.

I try removing external battery, pressing the reset switch for the second (internal) battery, pressing and releasing the power on button, but without success.
The only way to resume the laptop, is opening it, and detach and reconnect the connector of the internal battery.

http://i.imgur.com/2VsRLdn.jpg

Now i'm working with the connector detached, to avoid every time the need to open the case in order to boot the laptop :)
What do you think?
Battery seems ok (the charge is the usual), and once reconnected the laptop boot without problem...

Any suggestions?
Thanks
MIrco
T440s 20AR S08Q00, T500 2082-9JG, T60 1952-CTO, R50P 1832-22G, T40 2374-PG2

Thinkpad4by3
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Re: T440S sometimes won't boot unless i detach che internal battery

#2 Post by Thinkpad4by3 » Fri May 19, 2017 12:18 pm

Buy a new batt and try, maybe ur battery is internally shorted??
Thinkpads: 570e,A31p,T40,T42 x3,T42p UXGA,T60p,T61,X61s,X201,X220,X230,T410,T420,T430s(dead),X240 with mod.
New: 701c, 755c
Others: Zenith 286 supersport, Mac Portable 5120.

pictux
Posts: 46
Joined: Thu Oct 04, 2007 4:33 pm
Location: Treviso, Italy

Re: T440S sometimes won't boot unless i detach che internal battery

#3 Post by pictux » Sun May 21, 2017 10:30 am

Hi and thanks for the reply.
I don't think the internal battery is shorted, because after i detach & reconnect it, it's recognized correctly and it works...
Am i wrong?
Thanks
T440s 20AR S08Q00, T500 2082-9JG, T60 1952-CTO, R50P 1832-22G, T40 2374-PG2

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