thinkpads.com Support Community Forum Index Bill Morrow's thinkpads.com Open Forum - The Original Thinkpad Support Forum
Follow ThinkpadsForum on Twitter
Goodbye Lorita, wherever you've gone..

If you've found this forum useful, please consider donating a dollar or two

It is currently Fri Mar 24, 2017 8:46 pm

All times are UTC-05:00




Post new topic  Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Tue Mar 21, 2017 4:52 pm 
Offline

Joined: Sun Aug 28, 2016 9:27 am
Posts: 1
Location: Bzh, France
Hi everyone !

I have a T420 (and I like it) with a trackpoint failure ; a SMD component has been pulled off the board as you can see on the pictures below :

Image

Image

The problem is that I can't identify this component so I can't replace it. I searched for a similar component on used motherboards or any kind of equipment with SMD on it... no success...
Is anyone has an idea of what it is so I can try to fix it ? :idea:

Note : I can live without the trackpoint working then I won't buy a complete keyboard just for replacing this little...thing. ;)

_________________
« Fetchez la vache ! »


Top
   
PostPosted: Tue Mar 21, 2017 7:39 pm 
Offline

Joined: Fri Feb 17, 2017 5:02 pm
Posts: 6
Location: Riga, Latvia
Hi

In fact you do not want to know :)

First you need to find out the name of the microcontroller - see image :
https://geekhack.org/index.php?action=d ... 3229;image

If this name is TPM754A, see page 9 :
http://pdf.datasheetcatalog.com/datashe ... PM754A.pdf

Maybe you will smile fortune, and it will be just a resistor

Good luck


Top
   
PostPosted: Tue Mar 21, 2017 8:48 pm 
Offline
Junior Member
Junior Member

Joined: Fri Oct 17, 2014 8:13 pm
Posts: 498
Location: kingston, ontario, Canada
Measure the SMD length and width and this will be your dimensions in 4 digits in mm, also they look right to be all same also I can tell they are resistors. Measure ohm with your meter on on both ends of each and see if all other 3 are same and get like ohmage one from any junker parts.

Cheers, thinkpadcollection


Top
   
PostPosted: Wed Mar 22, 2017 6:36 am 
Offline
Admin
Admin

Joined: Mon Sep 18, 2006 5:17 am
Posts: 17112
Location: Mt. Cobb, PA USA
Go to e.g. Wizz-Itech in Quimper and check with their repair/parts department if they have a spare keyboard from a T410/T420/T510/T520/X220/W510/W520, they are all usable.
Look at the color of the small "cups" under the individual keys: manufacturer NMB=red, ALPS=white, Chicony=grey

PS: as for your signature: holy cow! :mrgreen:

_________________
Lovely day for a Guinness! (The Real Black Stuff)

Check out The Boardroom for Parts, Mods and Other Services.
And don't forget the Motherboards! Refreshing webpages is advised!


Top
   
PostPosted: Thu Mar 23, 2017 1:12 am 
Offline
Admin
Admin

Joined: Sun Jun 04, 2006 1:26 am
Posts: 10036
Location: San Jose, CA 95120 USA
RealBlackStuff wrote:
PS: as for your signature: holy cow! :mrgreen:
Nice reference! I had that scene from the movie as my desktop background on a T23 many years ago.

_________________
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.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 5 posts ] 

All times are UTC-05:00


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited