125Troubleshooting GuideRequirements Before Contacting Samsung Customer Service CentreBefore calling Samsung Customer ServiceCentre, test your product as follows. Ifthe problem persists, contact SamsungCustomer Service Centre.Testing the ProductCheck if your product is operating normally by using the product test function.If the screen remains blank while the power LED blinks even when the product is correctly connected to a PC, perform product testing.1 Power off both the PC and product.2 Disconnect all the cables from the product.3 Power on the product.4 If No Signal is displayed, the product is operating normally.Checking the Resolution and FrequencyNot Optimum Mode will briefly be displayed if a mode that exceeds a supported resolution is selected(refer to Supported Resolutions).If the screen remains blank, check the PCsystem, video controller and cable.Chapter 13
