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If the calculator does not turn on
If the HP 40gs does not turn on follow the steps below
until the calculator turns on. You may find that the
calculator turns on before you have completed the
procedure. If the calculator still does not turn on, please
contact Customer Support for further information.
1. Press and hold the key for 10 seconds.
2. Press and hold the key and the third menu key
simultaneously. Release the third menu key, then
release the key.
3. Press and hold the key, the first menu key, and
the sixth menu key simultaneously. Release the sixth
menu key, then release the first menu key, and then
release the key.
4. Locate the small hole in the back of the calculator.
Insert the end of a straightened metal paper clip into
the hole as far as it will go. Hold it there for 1
second, then remove it. Press the key.
5. Remove the batteries (see “Batteries” on page R-4),
press and hold the key for 10 seconds, and
then put the batteries back in. Press the key.
Operating details
Operating temperature: 0° to 45°C (32° to 113°F).
Storage temperature: –20° to 65°C (– 4° to 149°F).
Operating and storage humidity: 90% relative
humidity at 40°C (104°F) maximum. Avoid getting the
calculator wet.
Battery operates at 6.0V dc, 80mA maximum.
Batteries
The calculator uses 4 AAA(LR03) batteries as main power
and a CR2032 lithium battery for memory backup.
Before using the calculator, please install the batteries
according to the following procedure.
hp40g+.book Page 4 Friday, December 9, 2005 1:03 AM