Help me

Hello Guy’s
I’m Korean and use noob english :3

first watch video plz

alert is

korean - “신호 탐색중입니다,”

English - “Signal is being searched.” ← Google Translate

that tv is PAVV(samsung) LN32T71BDA model

1360x768@60Hz

and raspberry pi 2 + OSMC

connect HDMI

but broken print(?) and disconnect reconnect

my /boot/config.txt

hdmi_group=1
hdmi_mode=4 ← 1280x720@60Hz

so How to fix broken print(?)

Try another hdmi cable
Try another video mode

ok.
i try it.