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if your computer came with a motherboard disc the sound drivers could be on it you might have to uninstall then restart your computer then reinstall both the sound drivers and the sound card make sure you have both of these devices backed up to a disc before uninstalling a yellow? question mark means you need to install/update driver to do this right click to install driver also click start control panel administrive tools computer management device manager scroll to sound,video and game controllers you might see a yellow question mark? Right click to reinstall drivers click start control panel sounds and audio,volume,advanced,speakers select appropriate speakers also audio you will find 3 drop down lists make sure you have the correct settingsthere also click start control panel sounds and audio devices you can adjust the volume there also select speaker volume you can change your settings there you can also tick in the box place icon in taskbar if his does not fix the problem
have you tried this control panel sounds and audio,volume,advanced,speakers select the appropriate speakers from the drop down list or navigate to the device manager scroll to system devices + to expand,system speaker right click properties then select use this device (enable) try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the sound card and the CPU central processing unit dust causes static to build up in a computer hope this helps
I've noticed this problem as well with mine. I noticed it does it mainly when the unit is cold, like less than 70 degrees F. A quick fix is to warm the unit by whatever means you possess. If the blinking is rhythmic, that may be the unit trying to communicate a problem, so check your connections, change the cords, clean any dust from the ducts.
Please try to check it from Control Panel > Sound, speech & audio devices > Sound and Audio Devices > Hardware tab > then select the Device Name then click Properties tab to verify its condition status or you opt to click Troubleshoot tab. regards
right click on desktop - click properties - click screensaver tab, and dropdown menu to none. this turns off screen saver. For power/hybernate....
start - control panel - power options. Change all pull down menus to "never"
Check if your PC can play audio on some other speakers or headphone.
If yes, check your monitor audio cable connections.
If no something's wrong with your PC audio drivers. Try re-installing them or could be a hardware issue with your PC. Get it checked.