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jebem · (This post was last modified: 06-17-2014 07:02 PM by jebem.)

(06-17-2014 03:54 AM)Dougggg Wrote: The SD Card is slow but the black square comes up with or without the SD card. also it did it before installing any libraries. So it is a mystery

OK, so it is not a hardware fault.
It means it is a software issue.
If the calculator was mine, my next step would be a full reset to factory defaults.
Quoting the above site " Press and hold the top left and right keys then the [ON] button, the 50g beeps and asks whether the user wants to try to recover the contents of memory. Press any key once and followed by answering NO to this question means that the calculator will be completely reset and everything will be deleted, bringing the calculator back to its state as new"

EDIT:
If the above procedure doesn't work, try this one:
- Press ON + F1 + F6
- Release F6
- Release F1
- Release ON
The calc ask "Try to Recover Memory?"
- Answer NO to clear all contents except the flash *

Or if it doesn't help either, try removing all the batteries including the button cell for at least 1 hour to be on the safe side.

* for the flash, please read the above link remarks.