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You problem doesn't sound that unusual. It does come up. Often it is corrosion at the ends of the fuses. Try rotating them in their sockets several times. Pull several and check to see if there is any. Because the typical fuse is made out of aluminum but the socket springs are brass, you get corrosion.
Here is one of many postings discussing the problem. Use the search feature in the upper right-hand corner.
Keep us posted,