HP 49g Graphing Calculator - Manual (Page 221)

Halting the system without using the keyboard
1. Insert the end of a metal paper clip into the hole in the back of the
calculator. Insert the clip as far as it will go. Hold for one second and
then remove the clip.
2. Press '
3. If necessary:
a. press and hold
b. press and hold {fD
c. release both keys.
If this does not fix the problem, you will need to reset the memoiy
(explained in the next section).
Resetting the memory
Resetting the memory returns the calculator’s memory to its default state.
All variables, directories, and programs you have stored in the calculator
will be lost, except for those that you stored in ports 1 (ERAM) and 2
(FLASH).
1. Press and hold down (M) (¡3) and (£6).
2. Continue to hold (ON) while releasing
(fD
and
(fD.
3. Release i
Calculator continually re-boots
A faulty or incompatible library can cause the calculator to re-boot
continually. This can occur when you install a HP 48 series library that
contains fimctions that are incompatible with the HP 49G.
1. Press and hold down (3 (backspace key) until the calculator re-boots
successfully.
2. Use File Manager to delete the faulty library from the port.
Troublehooting Page D-5