Laptop screen blank [Closed]

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Hello,


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.