HP 28S: How to Resuscitate? Message #1 Posted by Matt Kernal (US) on 4 Mar 2004, 8:29 p.m.
I have a 28S that is holding on to dear life. It needs some help to bring it back to health. Here's the problem: When the batteries are installed, and the ON button is pressed, ALL the pixels come on (and stay on), but nothing else happens. It won't respond to any keypresses (other than the initial ON key press).
I've tried a cold start Reset <ON + INS + RightArrow> (28S equivalent of 48 <ON + A + F>). I've tried a warm start <ON + UpArrow> (28S equivalent to 48 <ON + C>. It won't even turn off unless I remove the batteries.
I've shorted the battery terminals with a paper clip (for about 60 seconds), and even temporarily reversed the N-cell batteries. There is no external Reset hole to press.
Any thoughts or ideas to try? BTW, the batteries work great in another 18C and 19B I have.
Any and all suggestions welcome. Thanks.
Matt
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