HP 49g Graphing Calculator - Manual (Page 218)

Calculator will not turn on
This condition most likely indicates that the batteries have nm out. Install
new batteries and see if the condition persists.
If, after replacing the batteries, the calculator still does not turn on when
you press (0®, follow the steps set out in “Resetting the calculator” below.
If the calculator does tiun on but the main display is blank:
1. press and hold (ON)
2. press © several times
3. release
If characters still do not appear on tire main display, follow the steps set
out in “Resetting the calculator” below.
Resetting the calculator
To reset the calculator:
1. Press and hold i
2. Press and hold (F3)
3. Release both keys. The calculator should reset. If it does not:
a. 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.
b. Press
If this does not fix the problem, the calculator requires a service.
In the event that the calculator contams a libraiy with a bad configuration
object, the calculator will re-boot repeatedly. If this happens, hold down
the @ key to prevent the configuration object from running.
Batteries
The HP 49G needs three AAA batteries to nm. (Each AAA battery provides
1.5 volts.) To ensure optimmu operation always use alkaline batteries, and
always use batteries of the same brand and type.
Rechargeable batteries are not recommended because of their lower
capacity and short low-battery warning time.
Page D-2 Troublehooting