The Museum of HP Calculators
HP Forum Archive 20
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|HP 21 calculator|
Message #1 Posted by Chris Stam on 30 Jan 2011, 7:58 a.m.
I've brought back my HP 21 with a new battery pack to life.
Only problen is that the button "5" doesn't give any response (on the display).
I suppose this is an contact problem, however I cleaned the whole calculator's contacts allready with spray.
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