unplugging Dock connector to turn fan off doesn't work!

[jkn]

Hi all
here's a wierd thing...

I posted a little while ago about trying to turn the fan off on a Thinkpad Dock for my T22. I ended up with a second working dock, and decided to do this the easy way


The picture at
http://www.thinkwiki.org/wiki/Image:Thi ... nector.png

shows how by opening up the PCI card space the connector for the PSU fan is visible. I have done this and disconnected the small two-pin connector with a small pair of long-nose pliers. This is the same connector that I'd identified on my other dock sample as being connected to the fan, so I had a warm feeling...

I then plugged the dock and my T22 back in, and what the - the fan on the dock is still running ???!!!

Any clues what might be going on here?!

Thanks
Jon N

[gearguy]

A)
You have either unplugged something that is NOT the fan (in which case I suggest you put theplug back in asap)

B)
The fan is connected to the power supply more than once as a fail-safe incase one power link is broken

C)
IBM uses dark magic in the production of their docking station

[jkn]

Hi Gearguy

A)
You have either unplugged something that is NOT the fan (in which case I suggest you put theplug back in asap)

B)
The fan is connected to the power supply more than once as a fail-safe incase one power link is broken

C)
IBM uses dark magic in the production of their docking station

Yeah, I realise that these are some of the options. What's wierd is that this plug is indicated in the .PNG as being the one to remove - which implies that someone has successfully turned the fan off by removing this. And like I say, I had previously traced the fan wires to this point. So, I wonder, has anyone actually done this?

Regards
Jon N

[davidspalding]

"Someone" ... could be mistaken. Might compare with a hardware maint. manual for the dock (if available) to be sure.