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 12V
and J8 of 5V
No
No
Yes
Yes
Replace U1
Replace U1
How to know whether the Power board is broken?
Still having
problems
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
- 44 -
