A laptop is mostly used tech device now days and quite expensive as well. The screen is the most delicate part of it and can damage easily due to hard external force. But many times any damage on external screen leads to no output on it does not mean the problem lies with internal hardware as well. Laptop screen repair is considered as major task and the technician needs extensive knowledge of the subject.
But at initial level you can troubleshoot with easier steps and rectify problem so, it will be easier to approach technician with exact cause. Few of laptop repair stores offers free diagnose but many not so, basic troubleshooting can save your potential time along with money.
If the power light is glow then try to press caps lock button on the keyboard few times. If the button light glows and turned off then you can be sure that the problem is limited to external screen or display and not with the internal system. Then try to adjust brightness from low to high if you will be able to see display within it then the lightning is not sufficient to clearly seen screen of laptop. If these methods will fail then connect with external monitor and if you will be able to see the display then surely considered that problem lies only with external display and not with internal hardware.
Laptop repair store in Brampton- wificomputers Inc 