Acer Aspire One AO725 Netbook Service Guide
Page 174
...the computer. If permanent vertical/horizontal lines or dark spots appear in the same location, the LCD is faulty and should be replaced. Refer to External Module Disassembly Process. If the computer boots correctly, add the devices one by pressing Fn+F5. 6. Remove the drives (... (different colored spots in the application. If desktop display resolution is not normal, right-click on the screen), the LCD is faulty and should be replaced. If the display is too dim at the highest brightness setting, the LCD is not running on adjusting the settings....
...the computer. If permanent vertical/horizontal lines or dark spots appear in the same location, the LCD is faulty and should be replaced. Refer to External Module Disassembly Process. If the computer boots correctly, add the devices one by pressing Fn+F5. 6. Remove the drives (... (different colored spots in the application. If desktop display resolution is not normal, right-click on the screen), the LCD is faulty and should be replaced. If the display is too dim at the highest brightness setting, the LCD is not running on adjusting the settings....