doesn't want to come on It was on and just went blank

Firstly, you can try turn your computer off by pressing and holding down the start button. Next unplug the computer and then remove the battery. Press and hold down the start button for about 60 seconds.

You can also boot into safe mode to troubleshoot the black screen issue.

At your sign in screen when you fire up your PC, hold down your Shift key and click the power button at the bottom right of your screen, then select restart. ... Click the Restart button. On the startup settings, hit 5 or F5 to enter Safe mode with Networking.

If both methods are of no help, you may try to other methods.