At first read How to report an issue you’re having with CoreELEC.
Partial logs are in most cases useless.
Use recommended dtb (g12b_a311d_odroid_n2_dvb.dtb).
Double check wiring. Wiring for I2C is correct as VTV board was detected, but for transfering stream have to be correctly connected DVB_D0, DVB_CLK, DVB_SYNC and DVB_VALID pins.
What does mean ‘no picture’?
Have you tried scan channels in TVHeadend?
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