Acer A221HQV Acer A221HQV LCD Monitor Service Guide - Page 36

34 ACER A211H/A221HQ Go to contents page 5. Troubleshooting (continued) 5.2.2 Nothing displays on the screen (Screen is black and colour of LED is blue): Is backlight light up? OK NG Refer "Checking the backlight unit" section" Check the video cable for failure. Check the host for output signal with all black only. Does computer output RGB video signals? (VGA or DVI) 1) Change pattern of video signal output on the host. NG 2) Reconnect the video cable. 3) Change the video cable. (VGA or DVI) OK Check OSD menu is display on screen when you push NG the "MENU" key. Check if the LCD module signal cable is connected between the Interface Board and LCD module. Failure Point NG The LVDS cable is disconnected. OK OK Proceed "Abnormal sreen" section" Next Page