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8 Posts

01-20-2009

anywhere, usa

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Connector pin broken but charger still works, safe to use?

2012-08-28, 0:45 AM

On the power supply, at the end that plugs into the computer, the connector is cylindrical with a thin metal pin in the middle. That metal pin has broken off but the plug light still goes on when the connector is plugged in. Can I still continue to use the charger or will the computer be damaged? If not, I would appreciate an explanation as I am familiar with electronics. What is the function of the center pin? The plug end has a third prong for ground. Thanks in advance

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62 Posts

07-27-2012

Terra

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Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 0:57 AM
If it is still warrantied, you could likely get it replaced as a defective component.
Power bricks are inexpensive to replace, and whenever you have any future issue with your ThinkPad, you're always going to wonder whether or not the glaringly missing pin contributed to it.
If you live in the USA, it will be easy to replace if you look locally or even order an inexpensive aftermarket model on Amazon.

If you really like living on the edge of uncertainty by using electrical devices with broken components then keep on using it.
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5556 Posts

06-27-2008

US

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Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 0:58 AM

'evening...

 

what model ThinkPad are you using?

for reference, here's the info from my X220's hardware maintenance manual:

 

pwrplug.jpg

 

if you're using a recent machine that uses a 65 or 90w power supply, this should be applicable. i've never had either of the 135 or 170w units to look at.

 

hth to clarify a bit.


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8 Posts

01-20-2009

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Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 1:08 AM

Thanks for your response. It's a T500. The powersupply with broken pin is 65w, but I've also used 90w and that works fine too. I looked at the hardware maintenance manual for the T500 and it has that exact same diagram. So the pin (2) has 0 V? So it's not needed?

 

"If you really like living on the edge of uncertainty by using electrical devices with broken components then keep on using it."  - Sure - I was just wondering if anyone had any experience with it.



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5556 Posts

06-27-2008

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Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 1:12 AM

wrote:
Thanks for your response. It's a T500. The powersupply with broken pin is 65w, but I've also used 90w and that works fine too. I looked at the hardware maintenance manual for the T500 and it has that exact same diagram. So the pin (2) has 0 V? So it's not needed?

well... i'm not qualified to say "it's not needed". i can't imagine it being there if there wasn't some design purpose for it.

 

i've got so many of these things laying around that if i had one with a broken pin, i'd just pitch it. i do realize, though, that not everyone has a big box of ThinkPad parts and accessories accumulated over more years that one might care to admit. ;)

 

cheers.

 


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62 Posts

07-27-2012

Terra

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  • Message 6 of 14

Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 1:34 AM
I just had an ironic thought, the mushroom cloud in your avatar becomes a symbolic icon of the remnants of the room that caught fire from a malfunctioning and willfully used power brick.
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449 Posts

05-26-2012

Raleigh, North carolina

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  • Message 7 of 14

Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 12:45 PM

Hey Me,

 

As others have said we as a rule will never tell you that it is ok to use something that is broken and never tested for that use. Which this is an example of even though you can see that from sarbins diagram that you could get away with it without having any issues its better to use a product with all its parts. Also we can not tell you that you wont have any issue with it as we don't test adaptors with missing pins. I am almost tempted to do such a thing but have to say that if you can I would suggest you buy a new adaptor then run the risk of damaging yourself or your computer.

 

Best Regards,

 

Hiro

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8 Posts

01-20-2009

anywhere, usa

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  • Message 8 of 14

Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 16:41 PM
"i can't imagine it being there if there wasn't some design purpose for it." - That's what I'm asking, what's the design purpose of the pin? 

 "I just had an ironic thought, the mushroom cloud in your avatar becomes a symbolic icon of the remnants of the room that caught fire from a malfunctioning and willfully used power brick." - It doesn't appear to be malfunctioning though, that's why I'm asking.

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2380 Posts

03-09-2012

CA

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Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 16:47 PM
If the pin is not stuck in the notebook plug I would invest in a new adapter. If something goes in the notebook it would be a lot more costly.
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8 Posts

01-20-2009

anywhere, usa

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  • Message 10 of 14

Re: Connector pin broken but charger still works, safe to use?

2012-08-28, 18:59 PM

The pin is not stuck in the plug. I actually just replaced the dc jack because it was in pieces. (don't ask...) Good as new, I loved the well-illustrated manual. You're right, it would have been quite costly to take it into the shop instead. The pin was bent, and I was trying to straighten it with tweezers but it fell off instead. Thanks for all your opinions, but I'd still appreciate a response from anyone who has used a pinless adapter for a while, if there is such a person.

 

Interestingly, the Power Manager says "90W AC adapter is attached" even though it's 65W. This connector never did fit very well, but now that the pin is gone it fits very nicely.

 

I was googling to see what the pin might mean, found this for an HP charger: 

"This pin is used to identify that a HP adapter is being used and not a 
3rd party one.It is wired to some sort of DC signal input on the motherboard. "

(http://www.tomshardware.com/forum/73253-35-what-center-laptop-power-supply-plug)

 

That's why I was looking at the power manager, to see if it says "fake adapter" or something. But it doesn't.

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