Purchasing a new screen might be risky if you make it deliver at home as the device may have been damaged during delivery. Hopefully, UDPixel is a useful solution to inspect the device and try to fix it quickly.
First, UDPixel is a program that is going to help you to localize dead pixels on your screen and then try to repair them by forcing them to change state very quickly over several hours. It requires a pre-installation of Microsoft .NET Framework