fix for non booting t30

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ianf · #1 Post by **ianf** » Sun Nov 26, 2006 10:27 am

in my case strip m/b replace detached inductor on underside of m/b similar to t23 problem my fan ran at normal speed unlike t23 pulsing .

ianf

danage · #2 Post by **danage** » Sun Nov 26, 2006 10:55 am

i dont understand. please restate.

darkdragoon · #3 Post by **darkdragoon** » Sun Nov 26, 2006 11:39 am

I think what he meant was he fixed his T30 by replacing a lose inductor/transistor on the mobo whereas it's suppose to be a common problem for T23.

ianf · #4 Post by **ianf** » Sun Nov 26, 2006 1:21 pm

hello

thats correct i was hoping it maybe a fix for darkdragon as his boot probs are very much like mine

ianf

danage · #5 Post by **danage** » Sun Nov 26, 2006 1:24 pm

very interesting! could you explain the symptoms you had - was it memory-slot related as well? did you take pictures of how you did it? thank you!

darkdragoon · #6 Post by **darkdragoon** » Sun Nov 26, 2006 1:46 pm

The inquiry mind wants to knows. Please explain.

I now kept my T30 in suspend/standby mode and it work great with no problem.

ianf · #7 Post by **ianf** » Tue Nov 28, 2006 7:28 pm

sorry about delay

first no screen or backlight
fan running
cpu warm
chipset warm
radeon hot
all lights flash then power light left on only
fiddle between battery with mains then mains then battery only no bios battery, all combinations tried once back light flashed a few lines then nothing .
so it seemed logical it was a power related problem seeing that the large inductors are part of power smoothing/ regulation and given t23 have issue with them i tried the fixing of all the upper inductors then stripped board from lower case and one was loose .

solder back in place and all seems fine even upped cpu to a 2.2ghz
so the extra load has caused no issue

ianf · #8 Post by **ianf** » Tue Nov 28, 2006 7:34 pm

sorry

forgot to say both slots are populated front 1 gig and rear stick currently 256mb.
the onlr repair was solely to the most rear inductor /underside.

have now fitted an sxga panel, all round makes a super machine .

ianf

vlyne · #9 Post by **vlyne** » Tue Nov 28, 2006 8:00 pm

Cool! Glad you found the problem. I wonder if this is also the problem with the T20/21 series?? So, the MOSFETs were OK then?
Cheers

darkdragoon · #10 Post by **darkdragoon** » Wed Nov 29, 2006 6:47 am

ianf, I read your message but your problem is a little different from mind, Nevetheless, congrats on a job well done.

ianf · #11 Post by **ianf** » Wed Nov 29, 2006 6:39 pm

for darkdragon
if you have the board out just apply a little sideways torsion to the inductors i think under certain conditions there is contact but as soon as larger loads appear the poor solder fails ,just my thoughts also a fair mod i tried was to cool radeon with a passive heat sink the one i used cover the vid ram chips as well i rember reading that a firmware up grade was around for this rad chipset if i find it i will post. should solve the only reel weak point of the t30.
also for what its worth the upgrade to sxga is well worth it.

ianf
i timed the whole m/b strip down and rebuild upto the k/b but not bezel 50min

darkdragoon · #12 Post by **darkdragoon** » Wed Nov 29, 2006 8:47 pm

My God ianf, you sound like a mad scientist...

ianf · #13 Post by **ianf** » Thu Nov 30, 2006 4:06 pm

hello
for me thinkpads ( all) are the very best but getting something that some-one has destroyed/killed/ unloved is the best ,the t30 with the legs missing of the mosfets is a problem as i cannot track any down i checked a very dead t20 m/b to see if there are the same chips but no luck there ,at the moment i have 2 working t30s that were dead and two to rebuild 4x t21/22 and 2 very nice t23 but my money would always go to the t30 with plenty of ram and a larger cpu they are quite a muscle machine (my main pc is dual core amd with xp64) it has only 1,1/4 gig ram compared to main pc (4gb) but feels very decent , the t23 seemed to run out of breath even with a 1.2g tulatin and max ram ,
the only weakness is vid card ,just can't manage quake 4

sorry about this missive

ianf

Pooh · #14 Post by **Pooh** » Tue Dec 05, 2006 2:55 am

Hello all
Ianf, if it is possible please explain exactly what capacitor/transistor you soldered?
I have a problem with my T30. When I push the power button, the laptop powered on, the green lamps blinks and I can see that display is on. The display remains black and I can see that the HD does not work. So I think that the problem that I have pretty similar to the problem you had.
So please give me more details.
Thank you

ianf · #15 Post by **ianf** » Fri Dec 08, 2006 4:55 pm

hello pooh

yes it was infact a small inductor ( coil of copper wire wound around usually a piece of metal or ferrite ) the size is about 10mm in all plains almost a cube it has 2 connection tags to m/b it seems to provide ripple free power tp 5v line but there are 3 of them there in a line ,so it may be a perm between them.
if it were possible to see under the m/b through the pcmia port thats where they live and i reckon the action of sliding/ knocking the port about cause's it / them to fall off , they just solder back on .
if you strip it out and they appear ok don't be fooled give each of them a gentle twist just to check

good luck ianf

Weazletoe · #16 Post by **Weazletoe** » Sun Sep 02, 2007 11:37 pm

ianf wrote:hello pooh

yes it was infact a small inductor ( coil of copper wire wound around usually a piece of metal or ferrite ) the size is about 10mm in all plains almost a cube it has 2 connection tags to m/b it seems to provide ripple free power tp 5v line but there are 3 of them there in a line ,so it may be a perm between them.
if it were possible to see under the m/b through the pcmia port thats where they live and i reckon the action of sliding/ knocking the port about cause's it / them to fall off , they just solder back on .
if you strip it out and they appear ok don't be fooled give each of them a gentle twist just to check

good luck ianf

This seems to be and old thread, and this is my first post. But, I wanted to thank you IANF. I just inherited a T30, that was DOA. after reading your post, I'm in business!! thanks a million!

Speeder.dk · #17 Post by **Speeder.dk** » Mon Sep 03, 2007 9:33 am

Would it be the same solution in a T23 with the same problem

?

/Speeder

--Edit--

Whoops ... Misread something ... Thanks for the info

although I couldn't find any kind of loose inductor near the Pcmcia slot in my T23 :/ ...

Weazletoe · #18 Post by **Weazletoe** » Mon Sep 03, 2007 4:05 pm

If it's anyhel, the loose coil pack was right above the PCU on the left hand side.

fix for non booting t30

fix for non booting t30

T30 problem

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