41C won't power up


Fresh batteries. No corrosion or stain. No activity. Any suggestions?


Open it up (screw under each foot) and clean all the internal pressure contacts (battery and CPU board) with 91% isopropyl alcohol.

Check for broken screw posts and bosses under the battery contact assembly. Fix with plastic welding solvent (from a good hobby store).


First try a memory reset. This is the softest possibility with which I could restart some HP-41.


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