To conduct a thorough examination of your laptop monitor, you don't necessarily need any special tools. However, you can use a few basic things like a clean, soft cloth to wipe the screen, a flashlight to check for any dead pixels or screen damage, and an external display to compare the quality and clarity of your laptop screen.
You can also run a diagnostic tool or software to check for any issues with the display. Many laptop manufacturers provide their own built-in diagnostic tools that can help identify any problems with the display.
If you notice any issues with your laptop screen, like flickering, distorted colors, or the screen turning off randomly, you can try troubleshooting the problem by adjusting the display settings or updating the graphics drivers.
Lastly, to hold the screen on the laptop and prevent it from going to sleep or turning off automatically, you can adjust the power settings in the Control Panel or System Preferences, depending on your operating system.