I have a lenovo y520 working perfectly. Opened it up to clean the fans, and closed it with no tinkering. When I tried to switch it back on the laptop won't power up, there is a steady white light on the left side of the keyboard. I have to hard shut down it if I want to stop that light by holding down the power button. The power led on the left side doesn't light up unless I connect a charger, but the laptop it self wont turn on no fans running, just the led on the right side of the keyboard stays on. Please help a bit scared