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05-31-2014

EG

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Unstable LAN Port on T440s

2014-07-23, 22:02 PM

Hello everyone,

 

My LAN port seems to be unstable. I insert the cable and hear the clicking sound but no LED turns on. I have to push the cable further to get the indicator on. It may also disconnect if the cable moves.

 

Is this a faulty port? And, if so, what does it take to fix it? (i.e. what do they replace/fix?)

 

Thanks in advance!

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754 Posts

04-13-2012

IS

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Re: Unstable LAN Port on T440s

2014-07-23, 22:16 PM

Hey ampad.

 

I assume you've tested a couple of cables, right? And everyone of them does the same thing?

 

Cheers!

ThinkPad P1 - i7-8750H/32GB // ThinkPad P70 - Xeon E3-1505M/64GB
ThinkPad W540 (20BG) - i7-4800MQ/32GB // ThinkPad W520 (4282-W4Q) - i7-2720QM/32GB
ThinkPad T450s (20BW) - i7-5600U/12GB // Yoga 900 - i7-6500U/8GB
ThinkPad T61 (7665-CTO) - T7700/4GB // ThinkPad T60p (8741-C2G) - T7400/4GB
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24 Posts

05-31-2014

EG

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Re: Unstable LAN Port on T440s

2014-07-24, 2:10 AM
Unfortunately, yes. I tried 3-4 cables and they all work fine on 3 different computers, but not on my T440s.
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754 Posts

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IS

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Re: Unstable LAN Port on T440s

2014-07-24, 2:49 AM

Can you shine a light into the port to see if the pins are bent? Because if they are, they can easily be straigthened again. To swap out the port is another matter entirely.

 

Bent pins image.

ThinkPad P1 - i7-8750H/32GB // ThinkPad P70 - Xeon E3-1505M/64GB
ThinkPad W540 (20BG) - i7-4800MQ/32GB // ThinkPad W520 (4282-W4Q) - i7-2720QM/32GB
ThinkPad T450s (20BW) - i7-5600U/12GB // Yoga 900 - i7-6500U/8GB
ThinkPad T61 (7665-CTO) - T7700/4GB // ThinkPad T60p (8741-C2G) - T7400/4GB

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24 Posts

05-31-2014

EG

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Re: Unstable LAN Port on T440s

2014-07-24, 10:26 AM
You're awesome, AltiJarl!

It didn't anywhere as bad as it looks in that pic, but the leftmost pin seemed too "low." I slightly popped it with a needle and then inserting the cable put it *almost* in place. It does not look perfectly aligned, but it's much more stable now.

While I think I can just use this as-is for a few years without complaining, I'm quite a bit disappointed that the port was this fragile. This never happened to me (and on the same disk are 10-year-old desktop and laptop), especially that I didn't accidentally pull cable forgetting it was there or used excessive force to insert it.

Out of curiosity, if 1 PIN is completely damaged, how does it get fixed?

Many thanks, AltiJarl!
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754 Posts

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IS

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Re: Unstable LAN Port on T440s

2014-07-24, 16:04 PM

My pleasure my friend, glad I could help.

 

I have fixed more bent pins in ethernet ports than I care to remember and sometimes they just get bent for no apparent reason, weary copper in the pins that doesn't spring back to place, little nibs in the plastic casing that catch the pin during movement, the reasons are many for it and not specific to any brand or type of machine.

 

The only advise I can give on this is to treat your current port with care, as one should always do really, because this can happen at any given time and it is really bad for a laptop if a pin breaks off. That involves pulling out the planar in your machine for a port swap, even sometimes, if the damage to the port is prolonged, the whole motherboard needs replacing,

 

Instead of such an invasive, expensive and time consuming repair, you can always get a USB ethernet dongle or equivalent.

 

I hope your current port stays healthy for a long time though.

 

Cheers!

ThinkPad P1 - i7-8750H/32GB // ThinkPad P70 - Xeon E3-1505M/64GB
ThinkPad W540 (20BG) - i7-4800MQ/32GB // ThinkPad W520 (4282-W4Q) - i7-2720QM/32GB
ThinkPad T450s (20BW) - i7-5600U/12GB // Yoga 900 - i7-6500U/8GB
ThinkPad T61 (7665-CTO) - T7700/4GB // ThinkPad T60p (8741-C2G) - T7400/4GB
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24 Posts

05-31-2014

EG

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  • Message 7 of 7

Re: Unstable LAN Port on T440s

2014-07-25, 3:02 AM
Are you saying that this issue could be a sign of future problems to come?

From what I read (on different models), the ethernet port is soldered onto the motherboard and can only be fixed by swapping the motherboard. Can you confirm that for the T440s?

The laptop is only a month old and is under warranty. I'd rather not worry (excessively) about my LAN port after such a short time if it's something that can be replaced under warranty.

Much appreciated, AltiJarl!
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