Re: HP-25 Message #2 Posted by Michael de Estrada on 22 Nov 2013, 12:58 p.m., in response to message #1 by Wayne Selway
Well, you need to provide a bit more information, but most likely you've fried a chip in it, so it's essentially unfixable from a practical standpoint. Normally, this occurs from using the AC adapter w/o a good battery inside or poor contact with the battery. Does it respond to the keyboard and if so what are you seeing on the display ? An E by itself means nothing, but it will display Error when an error condition occurs, such as division by zero.
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