It's up to you -- if the system is under warranty, have the screen replaced immediately. If it is out of warranty, there's no harm in waiting until the fault becomes to significant to ignore and you'll then need to have the display replaced. This is the part you will need: [URL]  
It's been only a year since I've purchased Dell Inspiron 14 5410 2 in 1 and it had been working fine, but today I noticed a dark shadow in the lower right corner of the screen.  I ran a screen diagnostic by holding the D key down during powerup. The shadow was present in those as well. Could anyone please help me get it fixed? Thank  you.
Shadow in lower right corner