Determining If The Calculator Requires Service - HP 10BII Owner's Manual

Determining if the Calculator Requires Service
Use these guidelines to determine if the calculator requires service. If
these procedures confirm that the calculator is not functioning properly,
read the section "If the Calculator Requires Service" on page 123.
= The calculator won't turn on (nothing is in the display):
This condition most likely indicates that the batteries have run out.
Install new batterics.
If the calculator still does not turn on when you press (08):
1. reset the calculator (see below) and, if necessary,
2. erase the memory (see below).
The All Clear message should now be displayed. If this is not the
case, the calculator requires a service.
Resetting the calculator
1. Turn the calculator over and remove the battery cover.
2. Insert the end of a paper clip into the small, round hole located
between the batteries. Insert the clip as far as it will go. Hold for
one second and then then remove the clip.
3. Press (Q8).
4. If the calculator is still not responding, erase the memory (sec
below) and repeat steps 1 to 3 above one more time.
Erasing the calculator's memory
1. Hold down the @ key.
2. Hold down the (8) and then the (£V) key.
3. Release all three keys.
Memory is cleared and All Clear should be displayed.
= The calculator doesn't respond to keystrokes (nothing
happens when you press the keys):
1. Reset the calculator (see above) and, if necessary,
2. erase the memory (sce above).
The All Clear message should now be displayed. If this is not the
case, the calculator requires a service.
A: Assistance, Batteries, and Service 121