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Blue Screen Again
Posts: 6
Registered: ‎02-19-2012
Location: Germany
Message 1 of 106 (114,243 Views)

T420s No power, blinking power Led - won't boot

[ Edited ]

My 2 months old T420s declines to boot since this morning.

After pressing the Power-Button it starts to alternatingly flash the Power-Button light and the fingerprint reader LED.

Nothing else happens, no fan starting to run or anything else.

I haven't changed anything since yesterday when it booted with no problems.

 

Does anyone know what this could be?

Blue Screen Again
Posts: 6
Registered: ‎02-19-2012
Location: Germany
Message 2 of 106 (114,039 Views)

Betreff: T420s not Booting

I just discovered something else, when the Power-Button flashes up the Battery LED is blinking green.

This also happens with just the external Power-Supply connected without any battery.

What's DOS?
Posts: 1
Registered: ‎02-19-2012
Location: Switzerland
Message 3 of 106 (114,013 Views)

Betreff: T420s not Booting

I have exactly the same problem. If I find a solution I will let you know
Retired Guru
Posts: 1,053
Registered: ‎12-19-2011
Location: Malaysia
Message 4 of 106 (114,005 Views)

Re: T420s not Booting

Try removing battery and the AC. Then hold the power button for about 5 secs. then put the battery and AC back then try booting the PC.
*Non Lenovo employee*

I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)
Guru
Posts: 2,516
Registered: ‎03-19-2009
Location: Idar-Oberstein, Germany
Message 5 of 106 (114,001 Views)

Re: T420s not Booting

Check the USB ports whether there is a short circuit caused by a missing plastic flap.

--------------------------------
My home-forum: http://www.thinkpad-forum.de
Wiki: Deutsches ThinkPad-Wiki English ThinkWiki
My ThinkPad-Collection
Coffee must be like women's eyes: deep black & shiny. ThinkPads have to be like men's feet: deep black & matte!
Blue Screen Again
Posts: 6
Registered: ‎02-19-2012
Location: Germany
Message 6 of 106 (113,992 Views)

Re: T420s not Booting

[ Edited ]

At least someone else has this problem, too! Thought I was the only one while scanning through different boards for help.

 

Removing Battery, AC and pressing the power button doesn't help. That was actually my first attempt to fix it Smiley Happy

I've checked the USB ports and they all look ok, no missing plastic flaps, everything's solid and at it's place.

 

Guess I'll just call the support tomorrow and see if they can help me...

Guru
Posts: 2,516
Registered: ‎03-19-2009
Location: Idar-Oberstein, Germany
Message 7 of 106 (113,983 Views)

Re: T420s not Booting

... or call www.servion.de

--------------------------------
My home-forum: http://www.thinkpad-forum.de
Wiki: Deutsches ThinkPad-Wiki English ThinkWiki
My ThinkPad-Collection
Coffee must be like women's eyes: deep black & shiny. ThinkPads have to be like men's feet: deep black & matte!
Blue Screen Again
Posts: 6
Registered: ‎02-19-2012
Location: Germany
Message 8 of 106 (113,965 Views)

Re: T420s not Booting

@Ytrewq:
I just called servion and they told me that it's probably the mainboard causing the troubles.
Seems I have to mail it in for repairs.

Bit Torrent
Posts: 2,403
Registered: ‎04-08-2011
Location: USA
Message 9 of 106 (113,954 Views)

Re: T420s not Booting

Is your T420s under warranty and is that your warranty service provider?

Posts: 8,592
Topics: 428
Kudos: 1,547
Solutions: 347
Registered: ‎11-19-2007
Location: US
Message 10 of 106 (113,950 Views)

Re: T420s not Booting

All,

 

For this particular scenario, it is most likely the system board.   It is probably still a good practice to pull the battery and AC and try to reset by pressing and holding the power button several times, for several seconds each time, and then re-attaching AC and try to restart.

 

If the symptoms remain, please contact service for assistance.

 

Best regards,

 

Mark

____________________________________________

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