AItech ProA/V Media Extender - Wireless HDMI - Manual (Page 18)

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(4) If it is in Standby mode and Loop-thru. display on (Transmitter POWER LED is lit in purple and
Receiver POWER LED is lit in red), press the POWER button of receiver o turn on the
TRANSMITTER and RECEIVER.
Note : During this period, TRANSMITTER will enter Standby mode and turn off Loop-thru.
display when press the POWER button of transmitter or press the POWER key of RCU to
transmitter.
(5) During the warm-up, the POWER LED will blink in blue until the signal link between the
TRANSMITTER and the RECEIVER is established.
Ensure your TV set or projector is in “HDMI input” mode, and is already powered on.