Acer Service Manual131.5.3 Process To Access Factory ModePower OffPress “AUTO”& ”MENU”button atthe same timePower OnRelease the “AUTO”& ”MENU”buttonPress “MENU” ButtonPress “<” ButtonPress “Menu” ButtonEnter the factory Mode1.6 Burn-in (Aging) Pattern1.6.1 Burn-in patterns are: full Red, Green, Blue, White and Black1.6.2 Stop burn-in pattern by providing with video signal from D-sub or DVI-D connector1.7 Warm UpAll test units have to be done warm up after at least 2 hours in a room with temperature of 40±5°C.(Except particular requirement)2. INPUT SIGNAL2.1 Video Signal Input