Alcad GRF-204 Manual De Instrucciones página 21

V I D E O P O R T E R O E L E C T R Ó N I C O - V I D E O D O O R E N T R Y S Y S T E M S - V I D É O P O R T I E R É L E C T R O N I Q U E
Blank screen on one of the monitors of a house or dwelling.
Check the connection between the connection bracket and the
monitor. Check the connections of the coaxial cable in the monitor's
connection bracket. f splitters have been used in the distribution,
check the position of the J1 configuration jumper in the connection
bracket. Check coaxial's connection from the connection bracket
to the video unit. If failure is not detected there may be something
wrong with the tap-off, connection bracket or monitor.