HP19BII self diagnostics


Can someone please explain how to do this? Thanks.


Paraphrasing manual, Appendix A, p.279 states:

1. Turn calc on

2. Turn printer on (if you have one) for more detailed diagnostics

3. If possible, return to main menu

4. Hold [ON] key while you press the fifth menu key from left. Once self-test started, do not press any keys until you're ready to halt the test. A series of patterns are displayed and one of two messages (briefly) before test repeats.

If OK, you'll see: OK- 19B II
Otherwise: a number, followed by FAIL

5. To halt test, hold [ON] and press third menu key from left.

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