HP 20b statistical distributions

[Marcus von Cube]

(02-26-2015 11:10 PM)Dieter Wrote:  I also sent you my cable. Do you still remember if it was OK, or did you have to use a different cable?

I don't remember. From the recent discussions I conclude that it may have a broken ERASE button or cable connection. ERASE can be easily performed by a simple wire jumper from the top right to the bottom left pin of the connector on the back off the calculator. Short these pins and either issue a reset through the little hole in the back or press ON. This should ready the device for flashing.