When the speakers are making sound when you are not playing something that has a sound is what we call leakage. This could be a low hum to a high pitch squeal.
The cause is often related to a bad noise filtering capacitor or liquid damage.
What was the warranty on the sale? I would bring it back to get fixed by them.
=== Update (11/26/2018) ===
This will take some work ;-{
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As you'll need to work though quite a few caps. I would start around the audio area first to check them. You'll need a set of schematics and board view to locate each one.
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You'll need a set of schematics and board view to locate each one. You'll also need to work though quite a few caps. I would start around the audio area first,
To give you an idea here is the part of the logic board you’ll need to start with
[image|1622083]
The Yellow marked chip is the DAC and the caps on this side and the other here
When the speakers are making sound when you are not playing something that has a sound is what we call leakage. This could be a low hum to a high pitch squeal.
The cause is often related to a bad noise filtering capacitor or liquid damage.
What was the warranty on the sale? I would bring it back to get fixed by them.
+
+
=== Update (11/26/2018) ===
+
This will take some work ;-{
+
+
As you'll need to work though quite a few caps. I would start around the audio area first to check them. You'll need a set of schematics and board view to locate each one.
+
+
To give you an idea here is the part of the logic board you’ll need to start with
+
+
[image|1622083]
+
+
The Yellow marked chip is the DAC and the caps on this side and the other here
When the speakers are making sound when you are not playing something that has a sound is what we call leakage. This could be a low hum to a high pitch squeal.
The cause is often related to a bad noise filtering capacitor or liquid damage.
What was the warranty on the sale? I would bring it back to get fixed by them.