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Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

T40/T41/T42/T43 series specific matters only
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joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#1 Post by joe4227 » Sun Jul 05, 2020 10:59 am

Having trouble replacing a keyboard for my T42. Mounting stud location is critical.

Keyboard is:

Part No: 39T0674
FRU No: 39T0704
ID No: 57A0XT
Model: JN-US
Bar Code: *11S39T0674Z1ZA3F57A0XT*
Last edited by joe4227 on Sun Jul 05, 2020 8:45 pm, edited 1 time in total.

kfzhu1229
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Re: Wanted: T42 Replacement Keyboard

#2 Post by kfzhu1229 » Sun Jul 05, 2020 11:06 am

joe4227 wrote:
Sun Jul 05, 2020 10:59 am
Having trouble replacing a keyboard for my T42. Mounting stud location is critical.

Keyboard is:

Part No: 39T0674
FRU No: 39T0704
ID No: 57A0XT
Model: JN-US
Bar Code: *11S39T0674Z1ZA3F57A0XT*
What are you having trouble with your current keyboard? Missing keys or broken board?
Is FRU 39T0704 exactly what you have currently?
I might have some parted out T4x keyboards that might help you
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 Replacement Keyboard

#3 Post by joe4227 » Sun Jul 05, 2020 11:24 am

The original KB seems to be breaking down. Function Key has come off, and won't stay on. Function and Control seem "shaky". Control is typing an accented "a" and does not work...

I tried order two keyboards. They didn't fit. The stud locations are important. There are only three studs on the back, and only one under the touchpad area.

Yes, the numbers in the original post are from the original keyboard. (Part No: 39T0674 FRU No: 39T0704)

Initially, I planned to repair the Function Key, but given that it seems to be getting worse, I decided to look for a replacement keyboard.

ajkula66
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Re: Wanted: T42 Replacement Keyboard

#4 Post by ajkula66 » Sun Jul 05, 2020 12:10 pm

The keyboards are different between the 14" and 15" models on T4x/R5x.

Given the keyboard FRU, it seems like your T42 is a 15" but could you please verify the 7-character model number on the bottom of the machine? It should look something along the lines of 2373-A1B...
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

FlexView AARP club members:A31p, T43pSF

Abused daily: T520, X200s


PMs requesting personal tech support will be ignored.

kfzhu1229
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Re: Wanted: T42 Replacement Keyboard

#5 Post by kfzhu1229 » Sun Jul 05, 2020 1:21 pm

From my knowledge, that is a 15" one with Alps switches.
Your keyboards that you've tried and does not work most likely are from 14.1" families. But if you happen to have an 14.1" ALPS one you can still swap around the keycaps and switches. Check the FRU number of the back of your keyboards that you've ordered wrong against the hardware maintenance manual from all of T4x and R5x models from the HMM archive above.
Your problem with the fn key is most likely the keycap or key switch having broken tabs. This kind of stuff happens when plastics get old (though this is still a country mile better than some other home computer key switches) or you didn't put it on properly.
You can replace the keyboard with anything from the 15" family of T4x or R5x series but if the switches aren't ALPS they will feel different.
Do note that there are several FRU's spanning from T42, T43 and R5x series that are all the same ALPS version. 93P4840 is also ALPS, US layout, from other T42 models and also R5x models.
I find it kinda ridiculous that they have to use different screw posts for the 14.1" and 15" versions. That isn't a problem in the newer T510/520/410/420/W510/520 series keyboards or the Dell D series keyboards from the time (Though the Dx00, Dx10, Dx20/Dx30 all have different keyboards)
Unfortunately I don't have a spare 15" keyboard around.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 Replacement Keyboard (Photos!)

#6 Post by joe4227 » Sun Jul 05, 2020 8:09 pm

The Machine is a 2378-REU dated 05/09.

And yes, it's T42, 15"

Right Control key works fine. Left Control does not respond. Key feels completely normal, but I haven't pulled the cap yet.

I've put photos on my Google Drive:

https://drive.google.com/drive/folders/ ... sp=sharing
Last edited by joe4227 on Sun Jul 05, 2020 8:32 pm, edited 1 time in total.

ajkula66
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Re: Wanted: T42 Replacement Keyboard

#7 Post by ajkula66 » Sun Jul 05, 2020 8:28 pm

So you need a keyboard with 3 posts as opposed to ones with 4 posts used on 14" models. You may want to put that bit of info in your thread title.

Happy hunting.
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

FlexView AARP club members:A31p, T43pSF

Abused daily: T520, X200s


PMs requesting personal tech support will be ignored.

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 Replacement Keyboard

#8 Post by joe4227 » Sun Jul 05, 2020 8:40 pm

Yes - three posts - the reason I say the post location is critical is that there are more than one kb with three posts for the 15" machines. And the FRU lists often erroneously list them as interchangeable.

Apparently, this T42 Model JN-US is not the common one...

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 Replacement Keyboard

#9 Post by joe4227 » Sun Jul 05, 2020 9:02 pm

kfzhu1229 wrote:
Sun Jul 05, 2020 1:21 pm
Your problem with the fn key is most likely the keycap or key switch having broken tabs. This kind of stuff happens when plastics get old (though this is still a country mile better than some other home computer key switches) or you didn't put it on properly.

I find it kinda ridiculous that they have to use different screw posts for the 14.1" and 15" versions.
The different screw posts on these models was to allow for the cardslot option, which didn't leave enough space fro the left post.

I need to keep this machine going, as it's a workhorse, and I have a number of Ultrabay accessories that I can't use in the newer T570.

I've confirmed the right Control key works. And the Function Key's centre post also seems to work - just no key. But the Left Control Key just types whatever second character you type (so no Control). I will remove the cap, and see if I can find any more info re: repairing.

Meanwhile, I suppose a matching ALPS Function Key assembly would get things rolling... I had considered this earlier, but found the online info re: key types completely baffling...
There are pictures of the Key base on the google link.

https://drive.google.com/drive/folders/ ... sp=sharing

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 Replacement Keyboard

#10 Post by joe4227 » Sun Jul 05, 2020 9:45 pm

kfzhu1229 wrote:
Sun Jul 05, 2020 1:21 pm
From my knowledge, that is a 15" one with Alps switches.
Your keyboards that you've tried and does not work most likely are from 14.1" families. But if you happen to have an 14.1" ALPS one you can still swap around the keycaps and switches. Check the FRU number of the back of your keyboards that you've ordered wrong against the hardware maintenance manual from all of T4x and R5x models from the HMM archive above.
Okay, on checking the HMM, i get completely different part numbers. I'm not familiar with these.

It lists the Alps KB as 93P4840. The NMB is 93P4780, and the Chicony is 13N9893. All for the 15" models...

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Re: Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#11 Post by RealBlackStuff » Mon Jul 06, 2020 12:19 am

@joe4227:
If your post is the last post in a topic, and that post has not been replied to, DO NOT CREATE A NEW POST!
Instead use the Edit button on your last post to add/change the contents.

junom
Posts: 3
Joined: Thu Mar 19, 2020 8:48 pm
Location: Quebec, Canada

Re: Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#12 Post by junom » Sat Jul 11, 2020 9:06 am

Still own a T42 and a few extra parts.

One such extra part is an extra keyboard :

Part No: 39T0674
FRU No: 39T0704
ID No: 5B20FB
Model: JN-US

PM me if it is still something you need.

joe4227
Posts: 13
Joined: Sun Jul 05, 2020 10:39 am
Location: Waterloo, Canada

Re: Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#13 Post by joe4227 » Wed Jul 15, 2020 2:08 pm

junom wrote:
Sat Jul 11, 2020 9:06 am
Still own a T42 and a few extra parts.

One such extra part is an extra keyboard :

Part No: 39T0674
FRU No: 39T0704
ID No: 5B20FB
Model: JN-US

PM me if it is still something you need.
Thanks, junom!
Just landed a refurbed 39T0704 like yours. I'll let you know if it doesn't work out - I may still need one. These are scarce...

kfzhu1229
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Re: Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#14 Post by kfzhu1229 » Wed Jul 15, 2020 2:43 pm

joe4227 wrote:
Wed Jul 15, 2020 2:08 pm
Thanks, junom!
Just landed a refurbed 39T0704 like yours. I'll let you know if it doesn't work out - I may still need one. These are scarce...
Depending on your luck, a "refurbed" keyboard can be one of those with aftermarket made switches and keycaps and can feel really weird in the hands and have sensitivity issues if you are unlucky. Fortunately in that case you can still get around it by transferring across the keycaps of your known genuine keyboard.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

junom
Posts: 3
Joined: Thu Mar 19, 2020 8:48 pm
Location: Quebec, Canada

Re: Wanted: T42 15" Replacement Keyboard 39T0674 (THREE mounting Posts)

#15 Post by junom » Sun Jul 26, 2020 3:05 pm

Thanks, junom!
Just landed a refurbed 39T0704 like yours. I'll let you know if it doesn't work out - I may still need one. These are scarce...
No trouble. You can contact me if you still need it.

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