T410 close lid fault

[CrendKing]

I have a T410. Recently I discovered that when I close the lid, nothing happend. The display is still on, and configured action (sleep, shutdown, etc.) is not executed. I uninstalled/reinstalled Power Manager and driver and monitor driver. Nothing worked. I booted to Ubuntu. Not worked. So I doubt if the suspend switch magnet (reed switch?) is fault? Is this possible? I remember the symptom occurs after a depot repair which replaced the LCD and touchpad. Is the switch related to these components?

According to the HMM, the keyboard bezel has a miscellanous part named "Magnet, suspend switch". Does that mean the sensor is under the bezel? Where exactly is it?

Thanks a lot! The faulty function drains battery power.

[Serge1410]

hey Crendking,

from reading this post, it looks like you're on a dual-boot system.

i would like to know, did this feaure work for you when the unit was on a mono-boot? if yes, then it could be that something in Ubuntu is causing the "close lid" feature not to work correctly when you're booting into windows.

[CrendKing]

Hi Serge. Thanks for reply! Please help me.

I'm not using dual-boot. I'm using the Windows 7. I installed most of the ThinkPad/ThinkVantage softwares I can get from System Update, including Power Manager and its driver. The symptom is observed in Windows (mono-boot).

I don't install Ubuntu in this machine. What I meant is that I tested the symptom with a USB-boot Ubuntu. You should know that everything is ran in ramfs. The symptom is also observed in the fresh Ubuntu.

I also did same 2 tests in my friends' T410 (almost new machine, same model). No symptom at all. Therefore I suspect it is hardware problem.

I heard that there is a magnet and reed sensor somewhere in the machine, but I do not know where exactly they are.

Thanks for help.

[mkingsmill]

I'm also currently trying to locate the display switch in a T500... (A model that shares many parts with the T400.) Can you tell me how to find the info you were looking at that mentions the magnet? (or at least describe where the magnet is located relative to the screen?) If you have a magnetic (reed switch) type lid switch, you can test it by putting a rare-earth magnet on the other half of the laptop (near the outside edge of the laptop, no further in than the frame on the display extends) to fool the computer into thinking you've closed the display.