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!
