Sony HVL-F42AM - Manual (Page 11)

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11 GB
Checking Batteries
The low-battery lamp on the display panel blinks when the batteries are low.
• If nothing lights up when the POWER switch is set to ON, check the orientation
of the batteries.
• If only the low-battery lamp blinks, change the batteries.
Changing the batteries is recommended
when the low-battery lamp blinks. The
flash unit can still be used when the
TEST button lights up in amber.