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

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?
Solved!
Go to Solution.

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
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
Program Manager, Lenovo Social Media (Services)
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T420s No power, blinking power Led - won't boot

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