LHB Series: DVR keeps beeping
Your LHB Series DVR can be configured to emit warnings or alerts when events occur such as video loss, hard disk drive (HDD) errors, or when the HDD is full. If the DVR is beeping, investigate the cause of the alert, and disable or configure the system warnings for future.
The following instructions require you to access your system using your DVR and a monitor.
To configure system warnings:
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In the taskbar, click the Main Menu icon (
), and then click Advanced > Warning. 
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In the Warning Type drop-down, select the system warning you would like to configure.
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Check boxes next to features you would like to activate when the selected event occurs.
REMINDER: Enabling Send Email requires you to set up email notifications.
Enabling email alerts using the Lorex by FLIR email server
Enabling email alerts using your own server information -
In the Buzzer drop-down, select ON for the DVR to make an alarm sound when the warning is triggered, or select OFF for the DVR to remain silent.
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Click Save to save your settings.
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Click OK.