Pulsing T23 Fan

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bobgarty · #1 Post by **bobgarty** » Fri Apr 13, 2007 11:29 am

Just spent around 2 hours inspecting and resoldering the inducters on a T23 systemboard I bought off ebay with a 1Ghz CPU that had a pulsing fan, even though they looked ok. Still got the pulsing fan .... rebuilt the T23 with the original system board and put the 1GHZ in - powered up and pulsing fan!!!! OMG what have I done I thought - reassembled with a known good 1.2Ghz and both boards work fine ..... so duff CPU and not inducters??!!?? gee ... lol

Website · #2 Post by **tfflivemb2** » Fri Apr 13, 2007 10:15 pm

hmmm....quite an interesting twist to what I thought was a tried and true theory....I guess that about sums up working on computers....nothing is ever set in stone...

Kaervak · #3 Post by **Kaervak** » Fri Apr 13, 2007 10:29 pm

Interesting indeed. There is another inductor that's near the video chip that you could try resoldering.

bobgarty · #4 Post by **bobgarty** » Sat Apr 14, 2007 5:13 pm

Kaervak - No need as it was the cpu that is at fault - board was probably fine when it was bought, just assumed the pulsing fan was due to the inductor solder problem ...

Kaervak · #5 Post by **Kaervak** » Sat Apr 14, 2007 5:27 pm

Well well, looks like we have another repair method for the infamous inductors.

dsigma6 · #6 Post by **dsigma6** » Mon Apr 16, 2007 7:30 am

I'm finally part of the T23 inductor problem, or so I believe. My T23 will boot about every fourth time, but even if it does, it'll freeze in Windows about 1 minute later, every time.

Website · #7 Post by **tfflivemb2** » Mon Apr 16, 2007 6:34 pm

dsigma6 wrote:I'm finally part of the T23 inductor problem, or so I believe. My T23 will boot about every fourth time, but even if it does, it'll freeze in Windows about 1 minute later, every time.

Does the fan pulsate when it doesn't boot?

Your symptoms sound more like a ram issue. Try removing and reseating the ram.

dsigma6 · #8 Post by **dsigma6** » Tue Apr 17, 2007 7:45 am

I'm posting in relation to my own topic:

http://forum.thinkpads.com/viewtopic.php?t=41163

Yes, when the screen is blank and nothing appears to be happening, the fan will pulse.

How dare you accuse my RAM of being the problem. I got this stick from Ray after BSOD's with my old one, and it hasn't given me any blue screen trouble. I'll try putting it in the other slot......

Here's what just happened 10 minutes into the Vista install:

http://home.comcast.net/~dsigma6/video1.jpg

And this was what it looked like last night:

http://home.comcast.net/~dsigma6/video2.jpg

edit: Switching RAM didn't make a difference, but I don't think you had enough info at the time to diagnose!

Pulsing T23 Fan

Pulsing T23 Fan

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