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11. Troubleshooting
Error
Possible Cause
Remedy
Device is switched on, no dis-
play, screen not illuminated
Battery flat
Battery inserted incorrectly
Device or switch faulty
Replace battery
Insert battery correctly
Contact dealer and
have device repaired
No laser beam function.
Battery flat
Replace battery
Display jumps or screen
“frozen”
Program error
Remove batteries, wait one
minute, reinsert batteries
Irregular display screen
Battery power low
Replace battery
Laser lines blink in one second
intervals
Battery flat
Replace battery
The device is switched on, the
display is lit up but a laser beam
is not visible
Ambient temperature
too high/low
Laser diodes or laser
control faulty
Allow device to acclimatise
Contact your dealer and
arrange for the device to
be repaired