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if you turned it on without speakers hooked to it you may have blown the speaker output amps or if the end of the amp remote wire touched a ground you may have burned a trace on the board did you here it play at the pawn shop? or did it just light up? sometimes the people at the pawn shop think if the unit lights up it is working and sometimes they check them is just hook power to them without speakers if so this can blow the speaker output I would take it back to the pawn shop
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 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
try swapping the speakers around if the problem still persists either the speaker is faulty or 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
have you tried this control panel sounds and audio,volume,advanced,speakers select the appropriate speakers from the drop down list or click start control panel administrive tools computer managementdevice 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 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
What sort of computer do you have? Is it a laptop or desktop? Many
laptops have this problem and it is quite widespread in laptops. The
crackling or humming noise could be a result of interference from the
mains power signal.
If it's a laptop, try running it on battery alone (take out the mains
power cord). My laptop has this kind of noise in speakers when running
on mains electrical supply, but it goes away like magic when I run it
A more long-term solution is to buy a 'Ground Loop Isolator' and insert
it between your computer and the speakers/earphones. They are quite
cheap and you could get it for under £10. It removes all static noise
and you'll hear crystal clear sound.
First, make sure that you have all the necessary cables connected, then make sure that they are all connected properly and tightly. Also, make sure that your computer is set to output to the correct output. If that doesn't work, then the speakers are probably broken. That's the exact reason why you don't buy stuff from pawn shops. Cheap, but crappy.
are you sure you have plugged in the speakers properly? maybe u inserted the cable in the wrong port or u just didnt insert the cable property. A loose connection can cause static and obviously it wont play anything. Please check.