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the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good or you might have to clean the dust from your computer dust causes static which causes your computer to overheat and all sorts of problems be sure to wear an anti static earth strap before touching anything inside your computer 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 CPU central processing unit and your SOUND CARD dust causes static to build up in a computer causing it to overheat any many other problems hope this helps
If you are going to DIY and have proper tools and know safety precaution then please read on: Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed VIEWSONIC monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also.
Can't say for sure (not a lot to go off of) but whenever i hear a buzzing sound from my speakers, its because of a poor connection (broken/exposed/bent) of the audio cables (whether its the red/white, or headphone jack (computers)).
It sounds like the backlight circuits are not working, it can be due to bad power supply. Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also. http://www.badcaps.net http://en.wikipedia.org/wiki/Capacitor_plague
Good day heigei, hi if you turn on the speakers but no ON lights came on, the problem is your Speakers' power supply stage, either a fuse opens (most likely) or something got burnt from the plug to the transformer, then to the rectifier diodes (got shorted then fuse opens) or to the regulator section. check also the power switch for poor contacts, of course you may need to open the speakers, If by any chance you hear something like hum.... check for open signal wire, check the IC amplifier also, a bad IC amplifier produce no sound or produce a loud humming/cracking sound. If you have no idea of what im talking about, have it checked by a technician. thats it.
It will produce sound when you click open the Volume icon in the system tray in the right bottom corner of the screen. Here you will find that the MIC has been muted (Old habit of Windows). Remove the tick from the box of mic and save. Now you and others will hear you talk. And remember to unmute it whenever you want to talk to anyone.
The noise you are hearing is the power supply attempting to start up. Unfortunately, a component has failed inside the power supply circuit. Most likely it is a capacitor. The good news is that the set should still be under warranty and the repair should not cost you anything. The bad news, is that the service person may not have a replacement power supply board with him/her when he/she arrives. This should be a quick fix as the replacement board is relatively easy to change.