I was shutting down my laptop x200 and closed before it shutdown niw it wont turn on plss help

Hi,

First do a hard reset with it, remove the battery and AC adapter then press and hold the power button for 20 seconds. Plug just the AC adapter then boot it up and if it does you can plug the battery back in as well. Next is to try to reseat the RAM, take them off them put them properly making sure they are all seated properly in each slots. Lastly is to connect an external monitor into it and if it shows any display on it that means there might be a problem with your display.