TROUBLESHOOTING GUIDE
E-3
No TV Picture
Replace Main PCB
Yes
No
Check
if v
oltage
of N3 pin1 is 5V
Replace UN2 HF
No Picture / LED is blue
Yes
Yes
No
No
Check
if back
light is normal
Check
the pow
er and
control signal of XP5
in main PCB is normal
Check
if v
oltage of HV
pow
er PCB U1,U2 is normal
Replace HV pow
er PCB
No
Replace Main PCB
Yes
Replace Main PCB
Yes
Yes
No
No
Check
if connector
of XP6 is normal
Replace XP6
Replace LCD panel
Check
if signal of
LVDS is normal
