Casio PV-S460/PV-S660 - Manual (Page 182)

180
Chapter 16 Technical Reference
Display Contrast
Key Tone
Possible Cause
Display contrast is too dark. Recommended Action
Adjust display contrast (page 160).
Problem: Display is totally black.
Recommended Actions
1. Slide the battery switch to NORMAL
OPERATION.
2. Replace batteries (page 21).
3. Adjust display contrast (page 160).
4. Click the Action control to turn on
power or turn on the screen tap power
on feature.
Problem: Nothing appears on the display when power is turned on.
Possible Causes
1. The battery switch on the back of the
unit is set to REPLACE BATTERIES.
2. Battery power is low.
3. Display contrast is too light.
4. Screen tap power on feature is turned
off.
Problem: The PV Unit does not beep when you perform an operation.
Possible Cause
The key tone is turned off. Recommended Action
Turn on the key tone (page 158).