When posting listings on a marketplace like TuDoMuaBan, we know that high-quality images and clear descriptions are what close the deal. However, I’ll make a strong affirmative statement: your ability to judge the quality of your own product photos is completely compromised if you haven't verified the integrity of your monitor. I firmly believe that "visual artifacts"—like backlight bleed or uneven color patches—distort your perception of contrast and brightness, leading you to upload photos that look great to you but terrible to your potential buyers. It is a business failure to spend time on a "free ad" while viewing your work through a hardware "window" that is visually defective. I’ve started using this black screen utility to audit my hardware before every major listing session, ensuring what I see is exactly what the customer gets. Do you think a "display audit" should be a standard step for online sellers, or is hardware maintenance irrelevant in the world of e-commerce?