Basic Checks

• Power Supply: Ensure your laptop is properly connected to a power source. Check if the charging indicator light is on.
• Battery: If your laptop has a removable battery, try removing it, then holding the power button for 30 seconds. Reinsert the battery and attempt to power on the laptop again.

2. External Display Test

• Connect to an External Monitor: Connect your laptop to an external monitor using HDMI, VGA, or another compatible cable. If the external monitor displays an image, the issue is likely with your laptop screen or internal connections.

3. Display Toggle

• Function Keys: Some laptops have a function key combination to switch between internal and external displays. Look for a key with a monitor icon (usually one of the F1-F12 keys) and press it along with the "Fn" key.

4. Perform a Hard Reset

• Hard Reset: Disconnect all external devices (USB drives, external monitors, etc.), remove the power cord, and, if possible, the battery. Press and hold the power button for 30 seconds, then reconnect the power and try turning on the laptop.

5. Check Brightness Settings

• Brightness Adjustment: Sometimes the screen might be turned on but the brightness is set to the minimum. Try using the brightness adjustment keys to increase it.

6. BIOS/UEFI Reset

• Access BIOS/UEFI: Restart your laptop and enter the BIOS/UEFI settings (usually by pressing a key like F2, F10, or DEL during startup). If the BIOS screen is visible, it indicates that the display itself is working, and the issue might be software-related.

7. Reseat RAM

• Reseat or Replace RAM: Sometimes, a loose or faulty RAM module can cause display issues. If you are comfortable doing so, open the laptop's RAM compartment, remove the RAM modules, and reseat them. Alternatively, try using a different RAM module if you have one available.

8. CMOS Battery

• Reset CMOS: Removing and reinserting the CMOS battery can reset the BIOS settings, which might resolve the display issue. This process can vary significantly between different laptop models, so consult your laptop’s manual.

9. Inspect for Physical Damage

• Check for Damage: Inspect the laptop screen and hinges for any physical damage. A damaged screen or hinge can sometimes cause display issues.

10. Professional Help

• If none of these steps work, it might be a more serious hardware issue such as a faulty motherboard, GPU, or a defective display. In such cases, it’s best to consult a professional technician for a detailed diagnosis and repair.

By systematically following these steps, you can narrow down the cause of the display issue and determine whether it's something you can fix yourself or if you need professional assistance