Check if pin47、pin48 in N201
have saw-tooth wave output
no
Check R256、C233
Check replace TDA8844
Horiznal bright line
abnormal
Check
R804
VD407
R413 VD405
Check T902
24
yes
Check if 15V 45V are normal ?
Check and replace R816 R817
R302 R303 DZ304 C310
normaol
