Laptop screen blank [Closed]


My laptop screen stays blank when I switch it on. I plugged in my tv to the HDMI and ran a system restore for the furthest back one there was which fixed it. Next day, same problem when I restarted it. A day prior to this, my screen would not brighten until I changed it in the BIOS at startup. I have an XPS M1530 on Viata. Thanks for your help.