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TROUBLESHOOTING
Yes
No
No
Check LED
Replace LED
with a new one
Is the power cord and
DC adapter plugged in?
LED lights up
Press Power button
Yes
LED light is green
LED light is red
Check inverter PWB unit Check MCU(U4)
1.Check MCU (U4)
2.Check CN3 (or
CN7) is connected
3.Check U8 has
VCC voltage
1.Connect the line
of J9and inverter
2.Replace inverter
with a newone
Replace MCU with
a new one
Replace DRIVE
PWB unit with
a new one
1.Replace MCU
with a newone.
2.Replace U8
with a newone.
Defective
Normal
Defective
Defective
Normal
Check power input system
1.AC adapter
*Normal?
*Connected properly?
2.U9 has +5V?
3.U10 has 3.3V?
4.LED controls electrocircuit?
5.JD3 and JD2 are connected?
Normal
TV DOES NOT TURN ON
Plug in
Defective
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