No sound No picture No light
Check if the power cord
is correctly connected
Yes
No
Connect the
power cord to the
socket
Check if there is voltage
pressure in J3(12V)
、
J5(5Vstb)
Replace
Remote
Control Board
Yes
Replace D806 or
U2
Still having
problems
Change
Mainboard
Check if L101
(
1.32V
)、
L102
(
1.8V
)、
L103
(
3.3V
)、
D101
(
2.5V
)
is
working
No
Chang
U1
Yes
Chang U101 OR U102 OR U105
OR D101
No
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