Verifique primeiro se o chassis é o 17mb12
Entre no modo de service e reconfigure as opções service scan/tuning setup
Factory Mode
Video Setup
Audio Setup
DRX
Options 1
Options 2
Options 3
Service Scan/Tuning Setup
External Source Settings
Picture Mode
Reset TV-set
Tuner Options- menu
Control Byte < +187 > or Control Byte < +142 >
Low-Mid - LB < +48 >
Low-Mid - HB < +9 >
Mid-High - LB < +240 >
Mid-High - HB < +26 >
BSW1 < +1 >
BSW2 < +6 >
BSW3 < +12 >
Service Scan/Tuning Setup
Search for L/L´ <yes>
Pref. Search Standard <L/L´> (other possible settings for this are <m> and <bg,dk,i> )
Station Ident <YES>
ATS Delay Time (ms) <50>
Color Kill Thr. <+70>
Agc Thr. <+200>
Ovm Thr <+160>