15C LE - weird self-test behavior


The ON+g+ENTER self test menu has 3 options the first of which turns on all the display segments. If you next press the roll-down key it will turn off half of them. Press it again to turn on the other half. The next press will turn them all back on again. This is all documented.

What's undocumented is what happens if you press and hold the roll-down key. On the 12C+ the display will rapidly cycle through the 3 displays a couple of times then terminate the self test showing the X register. On the 15C LE it will do the same then show the current program line. When you release the roll-down key it will run the program starting at that point.

This is pretty weird and a little scary, what's the self test doing running a program? I haven't seen anything like the other self tests that corrupt program memory but I haven't done much testing of this yet.


Edited: 19 Sept 2011, 11:52 p.m.

Possibly Related Threads…
Thread Author Replies Views Last Post
  HP PRIME : strange behavior when trying user key capability Damien 12 3,932 11-03-2013, 11:02 AM
Last Post: Joe Horn
  HP-42S ESD self-test Yriarte 2 1,558 10-24-2013, 09:08 AM
Last Post: Yriarte
  Prime formatting behavior Camille 0 868 09-28-2013, 05:37 PM
Last Post: Camille
  OT - A lucky find - Busicom Handy-LE LE-120A Cristian Arezzini 2 1,834 09-26-2013, 04:43 AM
Last Post: Cristian Arezzini
  So I took a test with my Prime today ... kris223 12 3,490 09-25-2013, 07:19 PM
Last Post: kris223
  Low power warning for HP-15C LE and batteries Nick_S 1 1,412 09-16-2013, 09:34 AM
Last Post: Hans Brueggemann
  hp50g screen weird line Sok-khieng Chum Hun 2 1,608 09-10-2013, 08:11 AM
Last Post: Sok-khieng Chum Hun
  Concern about Voyager keyboard test Matt Agajanian 2 1,435 08-30-2013, 07:56 PM
Last Post: Matt Agajanian
  HP 15C-LE replacement still available? Borja 16 5,542 08-22-2013, 11:16 AM
Last Post: Michael de Estrada
  wp-34s (Inconsistent Behavior) Barry Mead 2 1,345 07-23-2013, 02:54 AM
Last Post: Marcus von Cube, Germany

Forum Jump: