Sony STR-DE415 loud pop noise when cold

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Hi there
I have a Sony STR-DE415 I only use it as as STEREO amp whin a couple of pioneer speakes. Some day it started to make this loud pop noise on one of the channels. It just makes it a few times and then, after a few minutes, it goes away. It is like the amp gets "warm" and that makes the pop sound go away.
Any clues?
Thanks!
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.