257. Troubleshooting & FAQsMain Controls. It is valid only in VGAmode.Horizontal flicker appears• Adjust the image using the “Auto”function in OSD Main Controls.• Eliminate the vertical bars usingthe Phase/Clock of Setup in OSDMain Controls. It is valid only in VGAmode.Image appears blurred, indistinct or toodark• Adjust the contrast and brightnesson On-Screen Display.An "after-image", "burn-in" or "ghostimage" remains after the power hasbeen turned off.• Uninterrupted display of still orstatic images over an extendedperiod may cause “burn-in”, alsoknown as “after-imaging” or “ghostimaging”, on your screen. “Burn-in”,“after-imaging”, or “ghost imaging” isa well-known phenomenon in LCDpanel technology. In most cases,the “burn-in” or “after-imaging”or “ghost imaging” will disappeargradually over a period of time afterthe power has been switched off.• Always activate a moving screensaver program when you leave yourmonitor unattended.• Always activate a periodic screenrefresh application if your LCDmonitor will display unchangingstatic content.• Failure to activate a screen saver, ora periodic screen refresh applicationmay result in severe “burn-in” or“after-imaging” or “ghost imaging”symptoms that will not disappearand cannot be repaired. Thedamage mentioned above is notcovered under your warranty.Image appears distorted. Text is fuzzyor blurred.• Set the PC’s display resolutionto the same mode as monitor’srecommended screen nativeresolution.Green, red, blue, dark, and white dotsappears on the screen• The remaining dots are normalcharacteristic of the liquid crystalused in today’s technology, Pleaserefer the pixel policy for more detail.The "power on" light is too strong andis disturbing• You can adjust “power on” lightusing the power LED Setup in OSDmain Controls.For further assistance, refer to theService contact information listed inImportant information manual andcontact Philips customer servicerepresentative.7.2 General FAQsQ1: When I install my monitor whatshould I do if the screen shows'Cannot display this video mode'?Ans.: Recommended resolution for thismonitor: 1920 x 1080 @ 60 Hz.• Unplug all cables, then connect yourPC to the monitor that you usedpreviously.• In the Windows Start Menu, selectSettings/Control Panel. In theControl Panel Window, select theDisplay icon. Inside the DisplayControl Panel, select the 'Settings'tab. Under the setting tab, in boxlabelled 'desktop area', move thesidebar to 1920 x 1080 pixels.