When you replaced the fuse in the PSX did you also replace the fuse in the plug? Anyway whether you did or did not my advice is the same... make a decision. How much do they mean to you?
There are a couple of repairers who advertise on Ebay now... the better looking of them is here...
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Otherwise take them to a local and trusted repairer, a good one (may not be local but can be sent items) is Audiogold:
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Also try Cyrus's own service department, the only reason that I did not mention them before is that I have no direct experience of them...
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You might think that there is no way that you can afford the original manufacturer but they usually surprise you...
The flip side of the coin to repair? Upgrade.