HP48S strange behavior
|
06-26-2019, 02:31 PM
Post: #4
|
|||
|
|||
RE: HP48S strange behavior
(06-26-2019 01:41 PM)Daniel Sole Wrote: I think there must be some "hardware" issue. But it's quite a weird misbehavior. From an electronic point of view, I can only guess some kind of short inside between circuit tracks. The most common failure mode for old 48 series calculators is a loss of connectivity between the keyboard ribbon connector and the cpu board. The failure usually manifests itself as a loss of a row or column of keys. Try pressing down on the center of the calculator just below the screen. If the weird behavior goes away, you have a connector problem. The fix is fairly easy though opening the case is not. There are instructions (with pictures) posted in the old articles forum and in hpcalc.org directories. I followed member Han's detailed directions with success. With a little care you can have your old calc operating again. ~Mark Remember kids, "In a democracy, you get the government you deserve." |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 1 Guest(s)