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
Pin5 in J16.
No
No
Yes
Yes
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 to Power board.
Yes
No
Check if the break in the power
circuit
Replace the Power board.
- 45 -
Check if there is 5V
at pin7/pin8,and 12V at
Pin12/pin13 in J16.
