OnePlus Nord N20 5G Display not Turning On

Initial steps for addressing non-responsive display:

Power cycle: Press and hold the power button for 30 seconds to discharge residual power.

Step 1 | Malicious Application Installed

Unwanted applications can compromise device performance and cause it to become unusable.

Monitor your phone's performance while running applications.
If the screen stops working, consider uninstalling the application in question.
Restart your phone after removal to check if the issue persists.

Step 2 | Disconnected Screen

Device is vibrating or producing unusual sounds — may indicate hardware damage to screen.

Inspect the screen for physical damage.
If none found, check the screen connectors for signs of wear or damage.
Possible repair required; seek professional assistance if unable to resolve issue.

Step 3 | Software Issue

Try a simple reset: press and hold the power button for 5 seconds.

Turn off the device if possible, or try turning it back on to see if that resolves the issue.

Step 4 | Overheated Device

Exposure to extremely high or low temperatures can cause abnormal behavior in your phone.

Your phone may shut down automatically when overheated.

Do not attempt to use your phone while it is still hot, as this could damage the internal components.