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 Post subject: Repairing a Thinkpad T43 DC Plug
 Post Posted: Wed Mar 31, 2010 11:22 pm 
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Scott,

I am working on a relative's T43 Thinkpad that is suffering from a damaged power connector (3rd quote).

I was told the power cord was "ripped" out and now the only way to use the computer is to separately charge a two batteries and cycle them out. The original power adapter was replaced and I have confirmed the current adapter works correctly and the battery cycling method works. The adapter does not provide power to the laptop and the barrel adapter *does* fall out. I checked to see if the tang appears bent but it does not.

Given all of this, I wanted to get your opinion on whether I could replace this part as you instructed here?

I checked the Hardware Maintenance Manual and the System Service Manual for parts and I believe the plug is either built into the system board for this T43 Type 1875DMU (label 15; Item# 39T0324) or maybe the EMI spring, CDC (miscellaneous item label d; Item# 13R2915)?

Let me know if I need to provide any more details.

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 12:17 am 
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Fortunately that system uses a replaceable DC power jack that is plugged (instead of soldered) into the motherboard. The DC connector is included in the System miscellaneous parts (listed in the HMM) from Lenovo, but there are many vendors selling them separately online. Scott.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 12:58 am 
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Thanks. Looks like Laptop Parts Expert has it for $22.50 w/cable and Laptop Jacks has it for $29.99 w/o cable and 34.99 w/cable. Unless you would not recommend purchasing from Laptop Parts Expert or have a better suggestion I think I am going to go with them. Any thoughts?

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 1:00 am 
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Scott wrote:
Fortunately that system uses a replaceable DC power jack that is plugged (instead of soldered) into the motherboard.
I get the feeling you didn't even look at the links.<g>

Did you just pull that from memory?

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 9:39 am 
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Quote:
Any thoughts?

Only that I'd rather pay $5 than $20-$30. <g> I looked at everything necessary to provide the most accurate and concise answer, much of which does in fact come from memory. <g> Scott.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 9:32 pm 
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Hmm...considering that memory is a *volatile* form of storage, that means that most of the information *could* be corrupt, right? I sure hope you safely stored all those memory information facts you used to help me offisite somewhere.

I really do like $5 fixes though, so how can I argue?

Thanks for help as always. Oh and do yourself a favor and don't read Dilbert before posting here. <g>
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-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 9:52 pm 
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Not all memory is volatile. My memory is what you call *flash*. <g> Scott.

PS: My favorite Dilbert:
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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 01, 2010 9:56 pm 
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Touché. Well played, well played.

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sat Apr 24, 2010 9:44 am 
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Scott,

I got the connector (I got a couple so I would have a backup) and managed to replace it. The new DC connector now firmly holds the power cable in place. However, the problem is the same. There is no power reaching the MB but the laptop still works with the battery.

I have already borrowed a power cord from someone who has the same Laptop so I know it isn't a cord issue and I assume the connector works (it's new and hold the cable) but I have another one I can try if I need to. Should I try the other connector or trouble shoot other potential problems with the MB?

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sat Apr 24, 2010 9:53 am 
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If you have verified that you are using the correct AC adapter, the adapter is fully functional, and you have replaced the DC jack assembly, then I'd say the only other place to focus on would be the motherboard. I'd look at where the DC jack plugs into the motherboard, and possibly follow the traces from there to see if you can identify a bad solder joint, broken trace, or a burnt, leaking or otherwise defective component. Scott.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sat Apr 24, 2010 10:17 am 
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Alright, I'll give that a try when I get a chance. Is there a way I can actually test if the board is pulling electricity from the cable (in addition to carefully looking)?

Could any improper installation of the screws cause this? Is there any chance that a screw could be causing a short somewhere and if so is there an "easy" way to check for that?

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sat Apr 24, 2010 12:15 pm 
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The power LED will tell you if AC power is connected. I suppose that theoretically an improperly placed or utilized screw could cause a short, but that is highly unlikely. Scott.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Wed Apr 28, 2010 7:43 am 
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Evan you could use a meter to test the power pin. When you have it open up where the power pin you but you'll have to plug in the ac adapter and then check with the meter to see if you got power going though the pin if you do then i'll say it's the motherboard or like what scott said.

That what I had to do on a few hp notebooks.

be very carful when you have it plug in once you check to see if it has power though the power pin then unplug the laptop from the wall and make sure that the battery is taken out.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Wed Apr 28, 2010 6:15 pm 
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Thanks for the tip cyberghost. I won't have a chance to work on it till this weekend at the earliest but I will definately keep that in mind.

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 29, 2010 7:25 pm 
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yep your welcome.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Thu Apr 29, 2010 7:26 pm 
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Quote:
Did you just pull that from memory?


or Did you just pull that from Ram.


good luck with your laptop..


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Fri Apr 30, 2010 11:12 am 
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cyberghost wrote:
Quote:

or Did you just pull that from Ram.



:roll: ...A swing and a MISS!!!!!!!!!!!!!!!!!!!!!


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Fri Apr 30, 2010 5:37 pm 
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Thank for that FatGuy. That's the 2nd time "a swing and a miss" has given me a laugh in the last 24 hours. <g>

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Wed May 05, 2010 8:10 am 
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So what have you found out about that laptop yet.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Wed May 05, 2010 8:03 pm 
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I've found out I need more free time mainly. I'm definately going to follow up when I get a chance but I figured no one wanted to hear "nothing new yet". <g>

-Evan


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sat May 08, 2010 9:33 am 
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No we want to hear what is going on with the laptop until you get it fix or found out what is going on.


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sun May 09, 2010 11:05 am 
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Cyberghost he was saying he doesn't have time to come on here and post all the time. Maybe he has a job or something....


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 Post subject: Re: Repairing a Thinkpad T43 DC Plug
 Post Posted: Sun May 09, 2010 2:04 pm 
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FATGUY!..

Did I say that he should be posting all the time.


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