12-28-2015 05:25 AM
I have a T450S that is a few months old. It has worked fine until just the other day when it would not turn on.
When I push the power button, the green LED flashes three times. Then, the LEDs on the F1, F4, and Fn keys come on for several seconds and go off.
Here's what I've tried:
- Charging for an extended period.
- Removing the battery for an extended period.
- Removing the battery and holding the power button for 60 seconds.
- Pressing the button in the emergency reset hole.
Nothing has made any difference. Any ideas?
Solved! Go to Solution.
01-16-2017 09:33 AM
I know I'm late to the party, but I just wanted to reply incase anyone else is searching for the solution to this same problem.
My IT department started deploying T450s to users last year. We have a bunch of them run into this problem (pretty often, actually). I'm not sure what causes it, but our quick fix is to reset the CMOS. Just disconnect it from the mobo, wait a couple seconds, then plug it back in. After that, it boots up perfectly fine.
Since we don't know what causes it, unfortunately I don't have a long-term solution to possibly prevent this from happening again.
Anyway, I hope this helps someone!
02-13-2017 09:50 AM
Confirmed "quick Fix" (CMOS Battery removal/replug) - It seems that when the laptop goes into "sleep" mode, the battery drains out and won't come back.
I've had 4 of the T450's in a drawer do this that were apparently on sleep and battery drained.