crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 Dan

crwdns2934249:0crwdne2934249:0:

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.
+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
[image|1622084]
Will need to be checked one by one.

crwdns2915684:0crwdne2915684:0:

open

crwdns2934245:0crwdne2934245:0 Dan

crwdns2934249:0crwdne2934249:0:

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
+
+[image|1622084]
+
+Will need to be checked one by one.

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

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.

crwdns2915684:0crwdne2915684:0:

open