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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 CN101.

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 ?

Reconnect the power cord with

the outlet to Power board.

Yes

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 CN101.

Haier 48D3500A Service Manual

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