Chosen Solution
The screen doesn’t display anything.
Your LCD might not be responding due to low batteries. Try replacing the batteries and also try turning the camera on and off.
Also check out the troubleshooting page if you have any further questions. https://www.ifixit.com/wiki/Edit/Nikon_C…
Also check out the troubleshooting page if you have any further questions. Nikon Coolpix L840 Troubleshooting