T23 : Still FanError with new fan

[japanhonk]

Hi,

I just found this forum and found a lot of answers which might be useful in future.
I am owner of a T23 and like to use the thinkpad series.

Now I had the following problem :

after the CPU fan made me crazy by the noise , I monitored the message
"fan error"- so I tried to push the fan - and it started to run - but still noisy.

One day,pushing was without any effect,so I replaced the fan. The new fan
was tested by 4.5 V of a battery and worked fine.

I carefully opened the thinkpad and prevented a static overload while working.
So I detached the fans connector, replaced the fan and started the machine... but still a fan error message appeared. The fan did not start
to run as usual while booting the computer.
I tested the new fan again - it is still working. So the problem seems to be
the powersupply to the fan.
I also installed TP Fan Control to run it manually - but it does not run.
Even when displaying 70 C´, the fan does not start. After that I will
reduce the tasks or power down the machine to prevent an overheated
CPU.

After searching in this forum, I did not find a useful solution.
Do I have to replace the mainboard or is there still another chance to fix
the problem ?
By the way - the CMOS battery is now 7 years old... I read that an empty
battery could cause this message, but would that cause a complete fail
of the fan system ?

Greetings from Germany



Manfred

[JBUK]

You could use the lead and connector from your failed fan to see if there is 5v on the mobo for the first few seconds at bootup time. If that is dead then you need another mobo.

[japanhonk]

Hi,

thanks for the answer.

Given the fact, that the new fan is working , I can be sure that there is no power.
And I already checked the pins on the MB - they are still fixed. So I also believe the MB has blown up.
Just to be courious - could I have caused that by changing the fan ?
It is not the first time I disassembled hardware, so I was careful - well, I
THINK I was...

Fortunately, a new MB is not expensive for this machine...

By the way - would there be a way to get 3 - 5 V from anwhere else ?
Maybe I could run the fan directly.


Manfred