Answer to "Why won't my phone power on?"i had the same problems .. but i manage to solved it. download the stock rom and try flash it using SP Flash Tools . your device will surely revive from dead .. :D
Answer to "My lenovo a5000 not workimg"are u following the steps correctly in SP Flash Tools?
Answer to "Lenovo k910 not powering on. Screen blinks when connected to usb"have u tried to flash the phone ? if not try search for the phone's stock rom and flash it using SP Flash Tools .. hopefully it will be okay