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 Post subject: T43 fuse replacement PIC
PostPosted: Fri Nov 21, 2008 1:35 pm 

Joined: Fri Nov 21, 2008 11:42 am
Posts: 2
Location: Atlanta, GA
I have a T43, model 2686-M7U, that is having the same symptoms that other threads have mentioned, works from battery, but won't charge when plugged in. It was most likely caused by my frayed power cord :(

I took a leap of faith and bypassed the fuse next to the DC input jack temporarily. Luckily, the laptop started charging the battery and none of the other components blew up :)

However, I need to replace the fuse, but it isn't marked like the other threads have suggested, it is in the same position though. The fuse is blueish in color, but I don't see any apparent markings. I can provide pictures if it will help.

Does anyone know the rating and manufacturer of the fuse so I can order another one?

Last edited by tripsanders on Fri Nov 21, 2008 8:53 pm, edited 1 time in total.

 Post subject:
PostPosted: Fri Nov 21, 2008 4:57 pm 

Joined: Sun Jun 04, 2006 1:26 am
Posts: 10042
Location: San Jose, CA 95120 USA
Welcome to!

I haven't done much probing around a T4x motherboard (yet), but from what I've seen of T23 boards, the rating is probably around 10 amps and the manufacturer is probably Littelfuse. Both and sells surface mount fuses from this maker AND sells them in single unit quantities.

As usual in cases like this, a picture is indeed worth 1,000 words. If you can get a good close-up image of the part, with any type of marking or code visible, you can send it to me at the email address at the bottom of any one of my posts. Also, if you can, try to get a good measurement of the overall dimensions (length, width, height) so I can narrow down the search.

Ray Kawakami
X22 X24 X31 X41 X41T X60 X60s X61 X61s X200 X200s X300 X301 Z60m Z61t Z61p 560 560Z 600 600E 600X T21 T22 T23 T41 T60p T410 T420 T520 W500 W520 R50 A21p A22p A31 A31p
NOTE: All links to PC-Doctor software hosted by me are dead. Files removed 8/28/12 by manufacturer's demand.

 Post subject:
PostPosted: Fri Nov 21, 2008 6:10 pm 

Joined: Sun Jan 01, 2006 3:29 pm
Posts: 2911
Location: San Francisco, CA
You're talking about the one on the top of the board, right next to the power jack? Send me a PM with your address and I'll pull one off a dead board and mail it to you.

 Post subject: pictures
PostPosted: Fri Nov 21, 2008 8:45 pm 

Joined: Fri Nov 21, 2008 11:42 am
Posts: 2
Location: Atlanta, GA
Here is a picture of the fuse:


Admin edit: Shrank the picture down and changed hosting to my own site in order to get size ~50KB (original is at

PostPosted: Wed Aug 31, 2011 7:19 pm 
Sophomore Member

Joined: Tue Dec 02, 2008 1:47 am
Posts: 203
Location: Pukekohe, New Zealand.
Thanks again forum.thinkpads! I bought a T43p cheaply yesterday that was described as running from battery but wouldn't run from power or charge the battery.

I tested F2 and, sure enough, it was open circuit. I put on my cheap 3.5x supermarket glasses and got my $10 Jaycar soldering iron out and, with a lot of patience and a bit of solder wick, removed an F2 from a donor T43. I then piggy-backed it onto the T43p and now it's working perfectly!

So, thanks to this forum (and some fiddly work) I got a laptop that would normally sell for NZ$300+ for NZ$100!

Thanks again to all of the folks who contribute here, between you you've helped me indulge my passion for ThinkPads, taught me a lot and have also saved me money!

:bow: :bow: :bow:

T60 2007-72U [T7400, UXGA FV]
T43p 2668-H2M [FV]
T43 2668-84M [FV]
R52 1847-A18
T42p 2373-KXM [FV]
T42 2374-M97 [SXGA+]
R51 1829-E5C [FV]
R40 2723-BAM [SXGA+]
R40 2723-26M
X32 x 2 2672-CM5/W58
X31's x 8 Four working.
X30 2672-4HM
X24 2662-FMT

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