Sony KD-43X7 F Series Service Manual page 15

3.1 No power - LD board
START
1. Check fuse impedance
no
F1001
Is < 1ohm?
yes
2. Check impedance
no
D1001 to GND
Is > 1kohm?
yes
3. Check MOSFET
no
Q1007
Is > 1kohm?
yes
no
4. Check MOSFET
Q1002
Is > 1kohm?
yes
5. Check MOSFET
no
Q1008
Is > 1kohm?
yes
Check B board
Fuse F1001 broken
Diode D1001 broken
MOSFET Q1007 Broken
MOSFET Q1002 Broken
MOSFET Q1008 Broken
LD board
2
Q1007
3
4
1
5
15
SYS SET