I have an Acer Aspire X1470,win 7 Home Premium SP1, AMD Radeon HD64100 Display Adapter, 12gb RAM, AMD A4-3420 HD graphics 2.80 GHz Processor on a 64 bit operating system. I always had the display settings for 'Turn off the display' set to 'never' in the control panel under Power Settings. I don't know why but for about two months now the display keeps resetting itself to turn off after 15 minutes. no matter how many times I set it back to 'never' or restart the computer. I even created a custom power plan setting the display to never turn off, but that too keeps resetting to turn off after 15 minutes.