Samsung GX-SM550SM User Manual page 70

Appendix
 Troubleshooting
Abnormal HDMI output screen.
y If random noise appears on the screen, it means that TV does not support HDCP (High-bandwidth Digital
Content Protection).
y Plug Out/In the TV and the STB again.
First installation screen is shown again after performing the [Reset to default settings].
y It is a correct operation. When you perform the [Reset to default settings] in [Settings] > [System], All
settings including the PIN will revert to the factory settings. When the factory default settings are restored,
all stored user data is deleted.
During the booting, 'No signal' screen keeps over one minute.
y Check if your STB is power ON
y Check the connection between the TV input port set and the STB output port.
y Plug out the STB for over 2 seconds and then plug it in.
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