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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.
Display Contrast
Problem: Display is totally black.
Possible Cause
Display contrast is too dark.
Key Tone
Problem: The PV Unit does not beep when you perform an operation.
Possible Cause
The key tone is turned off.
Chapter 16 Technical Reference
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.
Recommended Action
Adjust display contrast (page 160).
Recommended Action
Turn on the key tone (page 158).
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