HP Forum Archive 08

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Dead HP 28C Message #1 Posted by Marcus on 30 July 2002, 10:45 p.m. My HP 28C is completely dead. Are there any known faults that might be repairable? How do you open the case (either side!)?

Re: Dead HP 28C Message #2 Posted by Vieira, Luiz C. (Brazil) on 31 July 2002, 12:34 a.m., in response to message #1 by Marcus Hi; under the plastic label, right over the display (you must carefuly remove it, try no bending it so much or you'll leave watermarks), you'll find heat-molded stakes. Cut them off (in a way you can rebuild tham) and the top cover will be off. I have a document somewhere in here that describes a way to open the 28 with more details. If you want to have a look at the stakes for now, do it. I have removed the label of two others, and I had to open one of them. One tip: right below the plastic label, you'll have access to the (+) and (-) battery poles; after testing them directly, you'll be able to decide if you need to open it or not (one of the two I was about to open was safely revived by just cleaning the batteries contact springs). Success.

Re: Dead HP 28C Message #3 Posted by Marcus on 1 Aug 2002, 9:14 p.m., in response to message #2 by Vieira, Luiz C. (Brazil) Thank you very much. I'd never have guessed that one!

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