Need advice on a starsound 7800

Hi i need advice on how to go about on this amplifier it was brought like this to me to repair
 

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Hi i need advice on how to go about on this amplifier it was brought like this to me to repair
I can not believe my eyes.
It happened to me in the past to have to replace pieces of the board, there is a way and a way.
If you do it as cleanly as possible and with criteria, there are no problems, but this is disgusting.
This is an example of my replacement of part of the board.
P.s. the red surface is not hot glue, but nail varnish.
 

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I can not believe my eyes.
It happened to me in the past to have to replace pieces of the board, there is a way and a way.
If you do it as cleanly as possible and with criteria, there are no problems, but this is disgusting.
This is an example of my replacement of part of the board.
P.s. the red surface is not hot glue, but nail varnish.
and.....
 

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