|Re: My HP-27S would not shut off, help!|
Message #6 Posted by bill platt on 23 Feb 2005, 12:41 p.m.,
in response to message #1 by Davin
I have looked in my manual for the 27s, and in addition to the removing batteries, then shorting the terminals for a few seconds, there are some other tests and procedures:
Hold down CLT wehile you press the third menu key from the left. It may be necessary to repeat the reset keystrokes severl times. The HP 27S displays "machine reset" to confirm. This reset will occurr automatically in some circumstances. (memory remains intact).
**Erasing Continuous Memory (delete4s everything you have stored):
Hold down CLR, and press the leftmost and rightmost menu keys simultaneously (all three keys at once). When the keys are released, you should see "MOMRY LOST"
1. Turn calc on. 2. If you have the printer, turn it on, too,
3. If possible, return to the MAIN display (shift main)
4. To start, hold down CLR while you pres the fifth menu key from the left (pressing the 4th menu key starts another meun test used at the factory. If you accidentally do thi one ytou can stop it by holding down the CLR key while you press the third menu key from the left).
Once the self test has begun, do not press any keys until you are ready to halt the test.
5. during the test, the calc beeps periodically, and displays various patterns and characters. Watch for one of two messages that are displayed at the end of each test cycle, before the test automatically repeats:
If it passes, "OK-27S-E"
If it displays FAIL followed by a 5 digit number, then you require service.
If you fail, run it again to be sure you did not cause it to fail by pressing the wrong keys etc.
Edited: 23 Feb 2005, 12:43 p.m.