What is this weird mark on my monitor screen?

Home of the computer component that you see most. This subreddit is for News, Reviews, or high quality discussions related to Monitors and Display Technologies. Technical Support and Purchasing Advice are allowed as long as they spark high quality discussion. https://discord.gg/ultrawide
Death note DS Games
/r/NintendoDS is the main subreddit for topics relating to the NintendoDS, DS Lite, or DSi. We are a fan-run community, not an official Nintendo forum.Looking for travel companions/group
Got questions? Need advice? Overwhelmed with your itinerary? Want to share your travel tips and experiences in Japan? Then this is the place for you! /r/JapanTravel is for any and all looking to visit Japan as a tourist — including those who have already been.TN or IPS?
This subreddit is for discussion about which Nintendo 3DS systems have IPS and TN screens.a cry for help or advice, what do I do?
Welcome to r/trans! This is a safe space for transgender people to discuss their lives and issues that surround them, find affirmation, and discover community. This is a radically inclusive subreddit for everyone under the trans umbrella; if you are binary, non-binary, genderqueer, agender, GNC, questioning, or any combination, this space is for you. You don't need to be trans to comment here, but this is not the place for questions or statements of opinion from outside of the community.Space problem

Battlestations are considered complete computer setups including an external monitor, mouse, keyboard, audio playback and recording devices (if applicable).