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Troubleshooting
Power Supply
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 17 Technical Reference
Recommended Actions
1. Slide the battery switch to NORMAL
OPERATION.
2. Replace batteries
3. Adjust display contrast
4. Press the center key to turn on power
or turn on the screen tap power on
feature.
Recommended Action
Adjust display contrast
Recommended Action
Turn on the key tone
182
(page
21).
(page
163).
(page
163).
(page
161).
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