charging problem

My laptop used to automatically shut down if not connected to a charger, but recently it went into Windows automatic repair on loop. However, it suddenly went dead while the screen was on the window automatic repair screen. Now it won't even charge, or even turn on. How do I fix this?

Hi, Today after trying to install AutoCAD my computer began freezing and not responding to commands, not even when I pressed the power button or ctrl+alt+del. Finally I got it to turn off, I turned it back on succesfully but it froze again. So I turned it off once more and let the computer cool...