M710 Intelligent Multifunctional LCD Screen Tester for Samsung/Huawei/Xiaomi
T-v18 Test Tool For Panel Led Lcd Screen Tester Support 7-84 Inches +voltage Transformer Board + 14pcs Lvds - Integrated Circuits - AliExpress
T-V18 Test Tool for Panel Problems LED LCD Screen Tester Support 7”-84” LVDS Screen
So I replaced my LCD screen, and while doing the exposure test on the new one I just installed I instead if the rectangle it showed the whole grid (See picture) is
How to check lcd screen - YouTube
PassMark MonitorTest - Test monitors and LCD flat panel screens
Here is a great file for testing flaws in your LCD screen...in comments : r/ElegooMars
Contrast - Lagom LCD test
Colour test screen
Test Tool for Panel Repair LCD / LED Screen Tester Built-in 80 Programs | eBay