40DIGITAL SIGNAGEDiagnosis When the product is not working properly, please check before you call customer center.Symptoms How to solve the problemScreen displays lateafter the power is on.It happens not to show the screen noise when the power is on. Therefore it is not adefect. But if the screen doesn't show up within 5 minutes from turning on, pleasecontact the customer center.The screen is too darkor bright? Adjust the brightness or contrast.The screen doesn'tshow up indicating"Out of range".You are using a signal which is outside the operating frequencies of the product(Unsupported), please change you video signal.when the screen isscrambled.please check the cable connection and the signal generator and contact customercenter.Automatic switching-onfunction is not working/ the input data weredisapperared whenreboot the system aftersetting up the timeAutomatic switching-on function is working when the product has been turnedoff via remote control or power button on main body. It is because that the set-up values are deleted when the power cord is unplugged.The screen and soundare not synchronizedCheck if the power is on, suspended or is correctly plugged into the outlet. Plugthe power cord of other peripheral device to the outlet that the product is beingconnected.