Its possible you have a bad audio driver board that once it heats up starts causing that problem. Try taking to radio shop unless your good with electronics.
SOURCE: Picture and sound go away after 2 minutes
Protection circuit fault kicks in. No vertical Deflection (V STOP),B+ over voltage protection (OVP), This is about a $150 -$200 to fix.
SOURCE: static noise
Check for the Third earth wire of your computer else check for the motherboard taking earth for the cabinet. Good luck
SOURCE: static noise coming out of speakers
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
on battery.
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.
SOURCE: rattling noise during engine start up.. 2005 mitz galant 2.4l
Probably a heat shield. Often time the screws that hold the shields in place rust away causing the shield to rattle. After the exhaust heats up, the pipes and shield expand causing the shield to stop rattling until it cools down again later when the car has been sitting for a while. Usually you'll find shields under or around the catalytic converter and around the exhaust pipe nearest to the engine. Most folks would probably recommend you remove the shield and be done with it. That's your call. Just remember though, the shields are there for a reason. In particular, the shield under the catalytic converter is there to prevent the possibility of starting tall grass on fire in the event you had to pull off the road for example to fix a flat tire or something along those lines. It might be unlikely, but its definitely been known to happen. Let us know how it goes. Thanks.
SOURCE: What causes the static background noise in my keyboard?
Hi,
It sounds as though you have a static electricity problem in your volume pot. Although there are sprays on the market that you can use for all of the electrical switches on your keyboard which removes and suppresses static electricity, one way to make sure this is the problem is to slide your volume slider to maximum, then minimum, up and down about 10 to 20 times, if the scratchy sound begins to diminish, you knwo the problem lies there. As a matter of fact, if you do it long enough, the sound may go away altogether, although without a good spray of electronics cleaner or electrical contact cleaner (which you can find at stores like home depot or online, even eBay), the sound will return.
If this is not the case, and the scratchy static sound does not go away or depreciate, it could be your cords or even static on the pc board inside the unit. If you are confident that you can crack the case on your board without causign damage, then get a screwdriver and open the case (all screws are located on teh bottom of the unit) and give it a good spraying with electrical contact cleaner on all of the contacts and even a once over on all of the circuit boards. Do not wet the circuit boards with too much spray, rather, give them a light misting.
For areas where you plug in, like your 1/4 inputs, your midi ins and outs, and headphone jack, spray the contact cleaner inside the holes. You don't have to worry about spraying too much in these areas. Just do not oversaturate.
Hope this helps, and thanks for using FixYa
Check for the Third earth wire of your computer else check for the motherboard taking earth for the cabinet.
Good luck
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