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kolyur
Paper Tape
Posts: 2
Registered: ‎12-28-2015
Location: Ohio
Views: 58,305
Message 1 of 14

T450S won't boot, power button flashes 3 times

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?

kolyur
Paper Tape
Posts: 2
Registered: ‎12-28-2015
Location: Ohio
Views: 58,521
Message 2 of 14

Re: T450S won't boot, power button flashes 3 times

Update: I called Lenovo support and am sending it in for repair.

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HashyB
Paper Tape
Posts: 1
Registered: ‎01-16-2017
Location: US
Views: 55,325
Message 3 of 14

Re: T450S won't boot, power button flashes 3 times

Hey kolyur,

 

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!

nahid1
What's DOS?
Posts: 1
Registered: ‎02-11-2017
Location: SA
Views: 55,054
Message 4 of 14

Re: T450S won't boot, power button flashes 3 times

The sol is perfect i have tried it working fine

Squigibo
What's DOS?
Posts: 1
Registered: ‎02-13-2017
Location: US
Views: 55,004
Message 5 of 14

Re: T450S won't boot, power button flashes 3 times

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.  

WheezinGeezer
What's DOS?
Posts: 1
Registered: ‎12-15-2017
Location: CA
Views: 44,655
Message 6 of 14

Re: T450S won't boot, power button flashes 3 times

Thank you HashyB. I tried your solution and it worked! Was ready to pay over $500 for a new motherboard.

 

Thanks again, WG

kpatterson38
What's DOS?
Posts: 1
Registered: ‎04-16-2018
Location: US
Views: 36,004
Message 7 of 14

Re: T450S won't boot, power button flashes 3 times

That worked perfectly !!!

mikey47
Paper Tape
Posts: 1
Registered: ‎07-19-2018
Location: US
Views: 28,474
Message 8 of 14

Re: T450S won't boot, power button flashes 3 times

Your solution worked like a charm on an Ideapad 110.. thank you
vegan-fanatic
Token Ring
Posts: 344
Registered: ‎05-27-2017
Location: CA
Views: 28,321
Message 9 of 14

Re: T450S won't boot, power button flashes 3 times

check for a BIOS update for the machines

I own: T400 T500 X220 X230 all running Windows 10 Professional
pepperjackjames
What's DOS?
Posts: 1
Registered: ‎09-04-2018
Location: US
Views: 23,607
Message 10 of 14

Re: T450S won't boot, power button flashes 3 times

This helped me on x260.  Thanks for the post!

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