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7.No tuning channels
DTV or ATV no Channels.
No tuning
channels
Tuner power/
Signal setting
Upgraded
crystal/I2C bus
OK?
software OK?
OK?
Change setting/
Check TV
Check & replace
Replace tuner
tune again
settings
power flow/crystal units
IC/MCU
Replace signal
Tune again
Replace main
Replace main
source
board
board
End
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