Check if the power cord
connect well?
Power on and check if
5V standby on the
Power board exists ?
Check if there is high
level (2.5V-5.0V) at
Pin2 in J7
Check J3 voltage of 12
and J8 of 5
No
No
Yes
Yes
Replace U7
Replace U7
How to know whether the Power board is broken?
Still having
problem
s
Check if Main board / LVDS wire / Panel are
in good condition ?
No
Reconnect the power cord with
the outlet or Power board.
Yes
No
Check if the break in the power
circuit
Replace Q806 or Q809
No
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