Sony GN3UN - Screen Blank, no Backlight

3f.1 Screen Blank, No Backlight
3f.1 Screen Blank, No Backlight - General Checking
Screen Blank, No
backlight
Check REG9V (AC ON)
V=8.9V to 9.1V?
No
Change IC9000 & *IC9001
AC ON screen blank, No backlight?
IC9000/ *IC9001
broken
Yes
Suspect : Other Part damage
Change the board
No
Yes
Check R9019/*R9021 & *R9365
R >9Ω and <11Ω?
No
Change R9019/*R9021 & *R9365
AC ON screen blank, No backlight?
R9019/*R9021 &
*R9365 broken
Yes
No
Yes
*For LK2
37