My card reader has begun making a loud squeaking noise when cards pass through it. It still reads and writes cards OK, but I'm concerned that the noise may indicate damage is ocurring to the mechanism. I've tried to open it up to see what's causing the noise, but although the four screws by the latches have been removed, it still won't come apart. It seems as though something is still holding it in the center at the top end. Is this a snap fitting, or a screw, or what? I don't want to damage the reader by trying to force it open. If it's a screw, I csn't figure out where it is or how to get to it.
HP-41 Card Reader Disassembly
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