My home theater speakers wont work?

I know what the problem is and I want to know if its fixable and if it is would it cost alot to fix.

The problem with is 3 of the 5 ports were you connect the speakers dont want to work. All 5 speakers do work because I checked them all on the other 2 ports that still work. So basically the problem is that the speaker ports dont work.

Any help would be greatly appreciated.

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