T400 won't wake up or start up after leaving it on all night

I just bought a T400, downgraded from Vista Business to Win XP SP3 and installed all of the win xp drivers. When I leave my computer on all night, the next morning I will have issues waking the computer up. I try FN+F3, FN+F4 (to force it to sleep), FN+F12 but nothings works other than pressing the power button and forcing a hard shut down.
For power management I did stop hard disk rotation after 3 minutes, enter system standby never, and hibernation never. If the hard disk rotation is, I can disable it, but is there a way to start the computer up afterwards?
Anyon else have this issue?
Solved!
Go to Solution.

That didn't work on my T400. Mine will not enter standby or hibernate and it just hangs. I have to do a hard reboot to get back in the system. In isolating the problem I have found out that Access Connections is the offending software. Once disabled, the system works fine. However, I lose the functionality of Access Connections which is a pretty slick program.

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My T400 won't stay in sleep or hibernate after some update

Howdy.........a couple of weeks ago I applied some updates to my T400 through Thinkvantage maybe......honestly I don't remember. But it was recommended updates for my machine to things like Power Manager and Access Connections.
After I did that, I've run into some issues I did not have before and am very frustrated with!
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hey mplehning,
welcome to the forums.
try uninstalling all ThinkVantage software and drivers from your system.
see if you're able to put your unit into sleep/ hibernate mode.
then install each software one by one and test after each installation on whether your unit can be place into sleep/hibernate mode.
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Ops I replied to myself in error.....
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I performed the steps indicated but this morning when I clicked the mouse and hit the space key and clicked the track pad again as before nothing happens.
I hold the power button for a few seconds and the screen fills as if the computer was normally awakened but it is locked up.
Then I have to shut it down with the power button and then power it up as a reboot.
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At this point, it would seem that you are down to two last options:
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But, I use the "Clone" feature.
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Make sure you get the 10.4.7 Combo Update stored somewhere so you can update again without downloading it.
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http://docs.info.apple.com/article.html?artnum=301270
The problem with Archive and Install is that sometimes problematic settings will survive using this method.
So, for best results, use the Erase and Install. Since you already have everything copied to another disk, this shouldn't be a problem.
Once the fresh installation is done, then see how your system behaves.
If everything is fine, then immediately install the 10.4.7 Combo Update.
Now, repair permissions.
See how things are now.
If everything is fine, then go ahead and setup your e-mail, programs etc.
Copy your data and files back, and resume operations
3) Now, if things still don't work right, then call your service shop and arrange for warranty repair.
It is a pain to go through all these steps. But, the service shop will blame software first unless the hardware test reveals a problem.
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Anyway, I hope that the re-install isn't needed. But, if it is, then the steps are listed above.
Start with the hardware test and other ideas above first. But, if those don't work or reveal something, then go ahead and re-install and let me know what you find.
Keep me posted on your progress, and let me know what does or doesn't work for you.
I hope this helps.

T400 won't wake up or start up after leaving it on all night

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