T400 entering sleep mode during use

[tonepaq]

My T400 with Windows 7 64 has been entering sleep during normal use. It is a fresh install and happens at any random time about every 5 minutes or less. It comes right back from sleep, but enters at will.

I want to find a power manage from Lenovo, but their support site has become so unbelievably slow, its unusable for me.

Any Ideas?

I should also note that this doesn't happen if sleep hasn't happened yes after a full reboot. If I restart, it will not happen untill I enter sleep once, then it begins until the next restart.

[mikemex]

No idea, seems weird. But sounds like related to the battery, maybe it's dying and when it hits a low percentage of charge it automatically goes to sleep from the alarm. Try disabling the alarm and see what happens.

[xxPaulCPxx]

Mine is doing it now as well. I don't have the Lenovor power manager installed, just windows. Power manager is set to hi perf and the sleep will kick on WHILE I"M TYPING. It just happened before I was able to type this!

I swapped batteries to - they are fully charged. I rebooted - still does it.