quEstions 169-171 rEFEr to thE Following mAnuAl. trouBlEshooting iF your tv DoEs not work，ChECk thE Following points： piCturE souhD possiBlE、CAusEs whAt toDo no piCturE noisE not propErly tunED ADjust tuning piCturE visiBlE no sounD ·volumE Control DiAlturnED too low ·EArphonEs insErtED ·turn up volumE ·DisConnECtEArphonEs piCturE All whitE sounD hEArD BrightnEss Control not sEt CorrECtly ADjust BrightnEss Control piCturE DArk or BlurrED sounD hEArD BrightnEss Control not sEt CorrECtly ADjust BrightnEss Control

whAt DoEs thE mAnuAl ADvisE iF thE piCturE is All whitEA、turn Down thE volumE
B、
B、ADjust thE BrightnEss Control
C、ADjust thE tuning
D、DisConnECt thE EArphonEs