Service manual

NO
YES
NO
YES
YES
YES
YES
NO
NO
YES
Check the main
board 12V ?
Check
F1,D5
+5.0 V ?
Check
U9,U11,R43
Check
U5
Check the main
board U5 / Pin 3 ?
H/V input
Signal ?
Change
U8
Check
H/V Signal
Change
Signal Cable
Display ?
OK !
Step 2