check monitor Menu > Other Settings > LCD Conditioning
@philiptong4978Ай бұрын
front panel top to bottom has button 1-4, to start built-in diagnostics: 1. unplug video cable 2. press and hold button 1 and 4 together for 2 seconds -> grey screen shown 3. press button 4 -> red screen shown 4. press button 4 -> green screen shown 5. press button 4 -> blue screen shown 6. press button 4 -> black screen shown 7. press button 4 -> white screen shown 8. press button 4 -> exit diagnostics