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 pin6 of J16 (5V),
Replace Remote
Yes
Replace the Power board
Still having
problems
Change
Mainboard
Check if LD23
（
1.2V
）、
U104
（
1.8V
）、
LD22
（
3.3V
is
working
No
Chang
U1
Yes
Chang UD9 or U104 or UD8
No
- 42 -
other:
can' t control
Control Board or
key board.
