Insignia 19KK44 Service Manual page 62

（6） Fail to search FM channels
Check if schedule bar is moving
when searching channels ?
Check if crystal of
FM module is working ?
No
Check out
crystal
Fail to search FM channels
Check if voltage of X406-1# is 3.3V ?
Yes No
Yes
Check out
FM chip
No
Yes
Check out N608
Check if I2C2 bus is
connected to X406-3#/4# ?
Yes No
Check out peripheral
circuits of I2C2 bus