Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
Pulsing Fan on a Dead T23? Check the inductors...
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
Pulsing Fan on a Dead T23? Check the inductors...
I just replaced a T23 system board that had died. On the old board, when powered on, only power LED and the battery LED would turn on.
As I removed the systemboard from the base, I saw that there was a little black capacitor that was just sitting there loose.
Here are are pics of the board and where the piece is supposed to go:
http://i27.photobucket.com/albums/c186/ ... 3mobo1.jpg
http://i27.photobucket.com/albums/c186/ ... 3mobo2.jpg
Do any of you think that it might be possible to solder this piece back on and have a fully operational T23 systemboard? It is quite clear where this piece belongs on the board.
Do any of you know what this part is for? I am not much of a schematic person to even try looking it up.
EDIT: Be sure to read all the way through this thread, as there were additional symptoms added to the list by other users.
As I removed the systemboard from the base, I saw that there was a little black capacitor that was just sitting there loose.
Here are are pics of the board and where the piece is supposed to go:
http://i27.photobucket.com/albums/c186/ ... 3mobo1.jpg
http://i27.photobucket.com/albums/c186/ ... 3mobo2.jpg
Do any of you think that it might be possible to solder this piece back on and have a fully operational T23 systemboard? It is quite clear where this piece belongs on the board.
Do any of you know what this part is for? I am not much of a schematic person to even try looking it up.
EDIT: Be sure to read all the way through this thread, as there were additional symptoms added to the list by other users.
Last edited by tfflivemb2 on Wed Jul 11, 2007 10:44 am, edited 4 times in total.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
As soon as I find my soldering gun (I think my wife lent it to someone), I think I will try it. It be nice to have a spare T23 board, since I just paid $96 for a replacement.
I think that it popped off as a result of flexing the board. The person that bought this T23 from me was picking it up one handed.
Now that I have his fixed, I will get mine back.
If it works, I might be in the neighborhood for a dead T23.
I think that it popped off as a result of flexing the board. The person that bought this T23 from me was picking it up one handed.
Now that I have his fixed, I will get mine back.
If it works, I might be in the neighborhood for a dead T23.
For the love of %/$(%$ don't use a soldering gun for this! It is SMD (surface mounted thingy). Use a thin thin tip soldering iron, magnifying glass, and don't touch the board too long for overheating will damage it.tfflivemb2 wrote:As soon as I find my soldering gun
Best is to try on a spare junk board a few times. :)
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
I have a "dead" T23 I might part with. I don't have the time to play with it, but the reason I have not sold it yet is because it is in MINT physical shape. I don't know what it is worth for the same reason.
The issue with it is it will boot up most of the time. On occasion it will not boot and gray bars show up on the screen and the cpu fan pulses. Let me know if you are interested.
The issue with it is it will boot up most of the time. On occasion it will not boot and gray bars show up on the screen and the cpu fan pulses. Let me know if you are interested.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
I just joined up to say thank you to you people. This occured with my Second hand T23 and I was really worried that it was for the bin (or at least an expensive motherboard repair).
Thanks to the posts here (especially tfflivemb2) I took my T23 apart, and successfully soldered the component back on. I even wrote about how I did it on my website. Either way the laptop has been working perfectly for a few days, and I just am overjoyed at this.
Hence why I am writing this post. Indeed once soldered there seems to be no further damage, and the laptop is working like new
Once again, thank you!
I am also amazed the flexibility and modular construction of the thinkpads, I really am impressed how builder-freindly they are, by far the easiest laptops to take apart and repair/upgrade. I'm pretty much a thinkpad convert now
Thanks to the posts here (especially tfflivemb2) I took my T23 apart, and successfully soldered the component back on. I even wrote about how I did it on my website. Either way the laptop has been working perfectly for a few days, and I just am overjoyed at this.
Hence why I am writing this post. Indeed once soldered there seems to be no further damage, and the laptop is working like new
Once again, thank you!
I am also amazed the flexibility and modular construction of the thinkpads, I really am impressed how builder-freindly they are, by far the easiest laptops to take apart and repair/upgrade. I'm pretty much a thinkpad convert now
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
thankyou!tfflivemb2 wrote:I am VERY glad to hear that it worked for you. This gives me hope.
I am trying to pick up a T23 with a dead systemboard, so that i can test this theory.
You just gave me a lot of confidence to try this. Thanks!!
P.S. Welcome to the forum!!!
If you like, you can have a look at this page where I wrote about my attempt. Might be something of interest there.
Last edited by UnixNut on Sun Dec 27, 2009 9:16 am, edited 1 time in total.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
Fyi, the broken off component L11 is an inductor (two connections means a choke).
In this and other forums I've heard a lot about broken and loose solder connections, particularly surface mounted components, is no testamony to the relative stiffness of the plastic tray under the systemboard. Closing the display before transporting the Thinkpad is best insurance against flexing the systemboard.
Just my 2 cents worth ¥.
In this and other forums I've heard a lot about broken and loose solder connections, particularly surface mounted components, is no testamony to the relative stiffness of the plastic tray under the systemboard. Closing the display before transporting the Thinkpad is best insurance against flexing the systemboard.
Just my 2 cents worth ¥.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
-
- Junior Member
- Posts: 256
- Joined: Mon Apr 03, 2006 10:30 am
- Location: Great White North
- Contact:
its alive!
got my T23 working, thought I would read the notes once again about the loose inductor. I took the T23 apart, looked at the inductors, gently pressed them to see if anything seemed loose, and voila, one fell off. I resoldered and it worked. its alive!
thx for the wiki post! it helped.
thx for the wiki post! it helped.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
I just thought it might be a good idea if I posted here. I just repaired two T23 machines with almost identical problems, however it was the other identical component instead of the one that was pointed out in the picture and blog documentation. They both work 100% now; though I've not had them on for more than 24 hours. (I think it had to do with the way these particular machines were picked up, near the Hard Drive)
I think we do have a trend here; and further investigation should be done to see if we can maybe put some non-conductive material under it to help prevent this from happening.
I think we do have a trend here; and further investigation should be done to see if we can maybe put some non-conductive material under it to help prevent this from happening.
-
- Sophomore Member
- Posts: 189
- Joined: Mon Apr 17, 2006 11:36 pm
- Location: Mesa (near Phoenix) Arizona
After reading this thread, I decided to dig up one of my broken T23 bases, and see what I could see.
Tore it apart, and there is a coil that is half broken off. I just saw this 5 minutes ago, so, maybe I have a T23 or 2, that can be fixed!
(Inductors, chokes and coils are all basically the same things. A coil of wire around a ferrite core.)
Tomorrow, after I get some home jobs done, I'll be firing up my soldering iron!
THANKS, Guys!
steve
Tore it apart, and there is a coil that is half broken off. I just saw this 5 minutes ago, so, maybe I have a T23 or 2, that can be fixed!
(Inductors, chokes and coils are all basically the same things. A coil of wire around a ferrite core.)
Tomorrow, after I get some home jobs done, I'll be firing up my soldering iron!
THANKS, Guys!
steve
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
I just bought two dead T23s hoping that the problem is the same. I have a new soldering iron, but am waiting on one of the Dead T23s to come, so that I have something "complete" to test it on.
I do have a dead T23 here, but without the LCD...hmm, I'll just hold off a little longer.
I do have a dead T23 here, but without the LCD...hmm, I'll just hold off a little longer.
Last edited by tfflivemb2 on Wed May 17, 2006 8:45 pm, edited 1 time in total.
-
- Sophomore Member
- Posts: 189
- Joined: Mon Apr 17, 2006 11:36 pm
- Location: Mesa (near Phoenix) Arizona
Well, I soldered the coil on, on one of my T23s, and put it back together, without a monitor or memory.
I got the 1-3-3-1 beep code, with the memory missing. After I put a stick of memory in and rebooted, I got a 2 beep message, the one that says the clock is incorrect.
Let's see what #2 does.
Oh, I found a third broken T23, so...
steve
I got the 1-3-3-1 beep code, with the memory missing. After I put a stick of memory in and rebooted, I got a 2 beep message, the one that says the clock is incorrect.
Let's see what #2 does.
Oh, I found a third broken T23, so...
steve
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
That is exactly why I just picked a few myself.
Although, I just got really lucky. I picked up a complete T23 (256mb ram, DVD drive, battery with 34 cycles) that supposedly had a dead system board, for $125. I was thinking that it might be the same problem. I purchased a spare system board for $87, just in case. Well, when I booted it up, it turned out that it only needed a CMOS battery. The only bad part is that it turns out that the LCD bezel and cover are cracked. I can't complain though.
EDIT: As I was typing this, I noticed that the replacement systemboard that I bought is completely missing the second PCB!!! Grrrr. Time to email that seller.
Although, I just got really lucky. I picked up a complete T23 (256mb ram, DVD drive, battery with 34 cycles) that supposedly had a dead system board, for $125. I was thinking that it might be the same problem. I purchased a spare system board for $87, just in case. Well, when I booted it up, it turned out that it only needed a CMOS battery. The only bad part is that it turns out that the LCD bezel and cover are cracked. I can't complain though.
EDIT: As I was typing this, I noticed that the replacement systemboard that I bought is completely missing the second PCB!!! Grrrr. Time to email that seller.
-
- Moderator Emeritus
- Posts: 5605
- Joined: Thu Sep 01, 2005 1:17 pm
- Location: Wisconsin
- Contact:
-
- Posts: 20
- Joined: Wed Mar 28, 2007 2:21 pm
- Location: Québec, Canada
T23 inductors
Hi guys ! 1st time poster, long time reader...
Lots of usefull information and knowleadgeable peoples here
Another succesfull T23 inductors repair.
I didn't had any symptom yet , but took the T23 apart anyway to be on the safe side.
Solders seem to look fine , but prying gently those inductors and they pop right off. Soldered them back on so they won't come off again.
Thanks a lot,
Rick
Lots of usefull information and knowleadgeable peoples here
Another succesfull T23 inductors repair.
I didn't had any symptom yet , but took the T23 apart anyway to be on the safe side.
Solders seem to look fine , but prying gently those inductors and they pop right off. Soldered them back on so they won't come off again.
Thanks a lot,
Rick
#1 T500 2241-AT6, T9600@2.8GHZ, 6Gb RAM, 320G HD, WSXGA+ DVD-RW added, webcam added
#2 T23 2647-8mf 1.13Ghz, 1Gb RAM, 80G HD , CD-RW/DVD combo, Win-XP Pro, Wi-Fi added
#3 T23 2647-2U3 1.13Ghz, 768Mb RAM, 40G HD, CD-RW/DVD combo Win-XP Pro
#2 T23 2647-8mf 1.13Ghz, 1Gb RAM, 80G HD , CD-RW/DVD combo, Win-XP Pro, Wi-Fi added
#3 T23 2647-2U3 1.13Ghz, 768Mb RAM, 40G HD, CD-RW/DVD combo Win-XP Pro
-
- Senior ThinkPadder
- Posts: 2299
- Joined: Wed Apr 26, 2006 2:13 pm
- Location: Philadelphia, PA
- Contact:
I just wanted to add my experience on a T23 with the pulsing fan.
Even with the loose inductor, your system may still boot. I found these problems were fixed after re-soldering a loose inductor:
-System sometimes starts but freezes soon after loading Windows.
-Video becomes scrambled/wavy.
-Pressure on the left side of the keyboard allows system to boot until pressure is released.
-Only the standby light blinks when the system is booted.
-HD turns on/off similar to the pulsing fan.
The thread relating to this issue can be found here:
http://forum.thinkpads.com/viewtopic.php?t=41163
Check those inductors for sure!!
Even with the loose inductor, your system may still boot. I found these problems were fixed after re-soldering a loose inductor:
-System sometimes starts but freezes soon after loading Windows.
-Video becomes scrambled/wavy.
-Pressure on the left side of the keyboard allows system to boot until pressure is released.
-Only the standby light blinks when the system is booted.
-HD turns on/off similar to the pulsing fan.
The thread relating to this issue can be found here:
http://forum.thinkpads.com/viewtopic.php?t=41163
Check those inductors for sure!!
Last edited by dsigma6 on Fri Apr 20, 2007 11:37 am, edited 1 time in total.
[Current] [Dell Latitude D630] : [Past] [T43] [T40] [T23] [T20] [R40] [X22] [600E] [570] [765D]
I'd just like to add another symptom. I recently picked up another T23 with the inductor issue and while trying to power it on, I heard a rapid and somewhat faint ticking noise coming from the area of the CPU. After resoldering the inductor, it boots just fine again. So pulsing fan and possibly ticking near the CPU are signs that there's an inductor problem.
-
- Junior Member
- Posts: 262
- Joined: Tue Mar 13, 2007 8:23 pm
- Location: Bristol, CT
- Contact:
-
- Similar Topics
- Replies
- Views
- Last post
-
-
Can I replace my T440p stock fan with a Noctua fan?
by cultOfThinkpad » Wed Jan 10, 2024 2:41 pm » in ThinkPad T430-T490 / T530-T590 Series - 4 Replies
- 1341 Views
-
Last post by keithsketchley
Mon Feb 26, 2024 10:04 am
-
-
-
X230 1440p backlight dead
by apojoga » Wed Nov 01, 2023 4:57 pm » in ThinkPad X230-X280 / X390 Series - 2 Replies
- 1551 Views
-
Last post by RealBlackStuff
Thu Nov 02, 2023 1:41 am
-
-
-
Using the display and keyboard from a dead T460s?
by Gord K. » Sat Feb 10, 2024 12:10 pm » in ThinkPad T430-T490 / T530-T590 Series - 1 Replies
- 372 Views
-
Last post by axur-delmeria
Sun Feb 11, 2024 6:32 am
-
-
- 7 Replies
- 529 Views
-
Last post by Gonzaleitor
Mon Feb 26, 2024 1:36 pm
Who is online
Users browsing this forum: No registered users and 29 guests