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 :
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 ?
Note : I can live without the trackpoint working then I won't buy a complete keyboard just for replacing this little...thing.
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
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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!
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Nice reference! I had that scene from the movie as my desktop background on a T23 many years ago.RealBlackStuff wrote:PS: as for your signature: holy cow!
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
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1 - The micro-controller is a PTPM754DR.
I tried to get some infos from the TPM754A datasheet, but I'm not good at understanding it. I'll give it an another try.
2 - SMDs are 1x2mm sized.
From left to right I measured : [the_missing_one] - [809 ohms] - [825 ohms] - [875 ohms]
Not exactly what I expected...but they seem close anyway.
3 - Keyboard "cups" are transparent white. I keep searching for spare parts...
I'm now going to cross the bridge of Death. If I see something, I'll tell you guys.
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