Haier LE22T1F Service Manual page 45

Check if the power cord
connect well?
Yes
Power on and check if
5V standby on the
Power board exists ?
Yes
Check if there is high
level (2.5V-5.0V) at
Pin2 in J7
Yes
Check J3 voltage of 12V
and J8 of 5V
Still having
problems
How to know whether the Power board is broken?
Reconnect the power cord with
No
the outlet or Power board.
No
No
Check if the break in the power
No
circuit
Replace Q806 or Q809
Check if Main board / LVDS wire / Panel are
in good condition ?
- 44 -
Replace U1
Replace U1
No