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
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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??
The only acceptable use for a MacBook is to shop for a Thinkpad.

Thinkpads: 570e,A31p,T40,T42 x3,T42p UXGA,T60p,T61,X61s,X201,X220,X230,T410,T420,T430s(dead),X240 with mod.
New: 701c, 755c, 755cdv
Others: Zenith 286 supersport, Mac Portable 5120, Tandy LT1400

pictux
Posts: 48
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

pictux
Posts: 48
Joined: Thu Oct 04, 2007 4:33 pm
Location: Treviso, Italy

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

#4 Post by pictux » Wed Jul 05, 2017 4:39 am

update: it has started with the same issue with the removable battery.
I have to remove it, press the boot button for a few seconds, and then reattach it.
Than i can boot my laptop.

As i've already said, batteries are charged when the power plug is inserted, and i've the usual power autonomy when running on batteries.
So they seem ok...

Any suggestion / tip?
Thanks,
M
T440s 20AR S08Q00, T500 2082-9JG, T60 1952-CTO, R50P 1832-22G, T40 2374-PG2

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

#5 Post by RealBlackStuff » Wed Jul 05, 2017 4:52 am

Try another (more powerful) charger.
Or if you have it, use an adapter cable such as this: http://www.ebay.com/itm/361863732964 with an older 65W/90W charger.
Wild guess: maybe switch off "USB always ON" in BIOS.
Have you checked that none of your USB ports is broken?
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pictux
Posts: 48
Joined: Thu Oct 04, 2007 4:33 pm
Location: Treviso, Italy

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

#6 Post by pictux » Sat Jul 15, 2017 10:46 am

Hi and thanks for the reply.
I've switched off "USB always ON" in BIOS, but nothing has changed.
USB ports seem all ok (i've tried with an usb key and a mouse)-
Just curious: how'd the charger affect the computer in this way?
Thanks
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

#7 Post by Thinkpad4by3 » Sat Jul 15, 2017 3:21 pm

It would give the computer mpre power to use between charging both batteries and running the computer.
The only acceptable use for a MacBook is to shop for a Thinkpad.

Thinkpads: 570e,A31p,T40,T42 x3,T42p UXGA,T60p,T61,X61s,X201,X220,X230,T410,T420,T430s(dead),X240 with mod.
New: 701c, 755c, 755cdv
Others: Zenith 286 supersport, Mac Portable 5120, Tandy LT1400

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