Re: Right channel Crackling noise.
- From: Quaoar <quaoar@xxxxxxxxxxxxxxx>
- Date: Mon, 03 Mar 2008 18:03:30 -0700
mike wrote:
I have a Dell Inspron 3700. The right audio channel makes a crackling noise
on signal peaks. Sounds just like what you hear when the speaker has
junk in it or is binding up.
But the same noise comes out the headphone jack.
It's loud enough to be annoying, but not so loud that you can see
anything obvious on an oscilloscope. It's not clipping.
Doesn't do it much when cold, but gets worse as it warms up.
I'm using powered speakers, so shouldn't be heating up the output stage.
Assuming I can construct a test signal so I can see the problem on
the scope, it's gonna be a nightmare to suspend it all disassembled
and working so I can probe it.
Anybody experienced this? fix? Audio section schematics? Do they use
an audio chip I'll be able to find docs on?
Thanks, mike
Don't bother: the sound chip or one of its supporting components is fried, IMO. This is a mainboard replacement, and I don't know of any notebook for which a mainboard replacement is less expensive than a new notebook. Well, unless the jack has corruption on its surfaces. Do you smoke? Cigarette smoke is a killer of jacks.
BTW, your Inspiron 3700 is more than six or seven years old? This age is terminal for most notebooks, unless it was operated in a clean room with a filtered AC supply.
Q
.
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