Fingerprint suddenly not working after

T420 was working perfectly for one year. I did run Lenovo update occasionally and install new drivers. Last night update installed new power manager 6 and new version fingerprint software. I was working after for more few hours without problems, suddenly system went down, all hardware was of, just keyboard light on top of  LCD and fingerprint sensor light went blinking. I did complete power off (dismount battery). After that T420 won’t start, just power button lighted and no bios screen.
Afterward I did start pulling out memory, DVD, hard disk,  … and tried to start machine.
After maybe one hour and numerous start tries (with battery, memory, hard disk and without) Thinkpad stared. I did put back all components back, and system started.
Now only thing that is not working is fingerprint reader. I did start Thinkpad hardware test and no problems are reported.
In BIOS fingerprint reader is enabled, but when I tried to start option to delete all passwords I get message: no fingerprint reader detected.
When I mount AC power to laptop, fingerprint reader goes little orange blink and after there is no green light.
Does anyone know should I be worried about this, since this is my working machine and at this point in time I can’t afford myself to  be without thinkpad until repair (thinkpad is still in warranty).
Regards and Thanks!
Solved!
Go to Solution.

Hi Kresimir,
Please try to remove power (both battery and AC) for overnight then re-connect AC only. If problem presist, please contact local Lenovo for further assistance
Worldwide Support Center phone list for ThinkPad, ThinkCentre and ThinkStation systems
http://support.lenovo.com/en_US/detail.page?DocID=HT036550
Fred
T61 + X201i

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