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I am pretty new to working on pcbs. I had an amp I saw start smoking on a Double Dragon board and the sound quit working. So I ordered a new one and am working to replace. After removing the component, the board looks like this. I think the bottom side looks ok, but the top side especially on the right looked kind of damaged. Did I damage it or is it just oxidized and burnt flux? I have tried cleaning with flux cleanr and alcohol and a toothbrush. But it doesn't seem to get cleaned off. If damaged, thoughts on repair? Thanks for any help.
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