HP 48gx User Manual

3. At the same time, press the left and right menu keys (A and F),
then release them.
4. Release the key.
5. Press Hil
The above steps also erase the contents of a plug-in RAM card—but
only if its RAM is merged with the calculator’s main memory.
If the calculator won’t turn on:
1. Press and release (ON).
2. If the display is still blank, hold down and press several
times until characters become visible; then release (ON). If no
characters appear in the display, check for too light of a display.
3. If nothing appears in the display, install three new AAA batteries,
as described under “Changing Batteries” in Appendix A of
HP 48G Series User’s Guide. Then repeat the previous steps.
4. If changing the batteries did not solve the problem, turn the HP 48
over. Remove the top right (as you face the bottom of the machine)
rubber foot. You should see a small hole with the letter R next to
it. Insert the end of an ordinary metal paper clip into the hole as
far as it goes. Hold for one second and remove. Press (ON). Repeat
the previous steps.
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5. If all of this doesn’t work, your calculator needs repair. Contact the
HP Calculator Support department (see the inside back cover).
If Things Go Wrong... 9-3

HP 48gx Specifications

General

Model	HP 48gx
Type	Graphing Calculator
Display Type	LCD
Display Size	131x64 pixels
Memory	128 KB RAM
Expandable Memory	Yes, via expansion cards
Release Year	1993
Processor	Saturn
Programming Language	RPL
Power Supply	3x AAA batteries
Weight	255 g (9 ounces)