Ответ на "T420 will not power on"also google for CMOS (try to hold the power button for a minute and then press it again), if you didnt setup your laptop to turn up after attaching an AC, then to try to replace the keyboard might help. never ignore the beeps.
Ответ на "My Droid 4 touch screen is not responding?"is it ok to buy a cheapest one from ebay/china? how do i know if its genuine? Thanks for reply